diff --git a/public/main/inc/lib/social.lib.php b/public/main/inc/lib/social.lib.php
index 5e29aed2ad..a425051ad1 100644
--- a/public/main/inc/lib/social.lib.php
+++ b/public/main/inc/lib/social.lib.php
@@ -153,7 +153,7 @@ class SocialManager extends UserManager
         $tbl_my_user = Database::get_main_table(TABLE_MAIN_USER);
         $sql = 'SELECT friend_user_id FROM '.$tbl_my_friend.'
                 WHERE
-                    relation_type NOT IN ('.USER_RELATION_TYPE_DELETED.', '.USER_RELATION_TYPE_RRHH.') AND
+                    relation_type NOT IN ('.UserRelUser::USER_RELATION_TYPE_DELETED.', '.UserRelUser::USER_RELATION_TYPE_RRHH.') AND
                     friend_user_id<>'.$user_id.' AND
                     user_id='.$user_id;
         if (isset($id_group) && $id_group > 0) {
diff --git a/public/main/inc/lib/statistics.lib.php b/public/main/inc/lib/statistics.lib.php
index dd49bb15ac..a4afee4a47 100644
--- a/public/main/inc/lib/statistics.lib.php
+++ b/public/main/inc/lib/statistics.lib.php
@@ -2,6 +2,7 @@
 /* For licensing terms, see /license.txt */
 
 use Chamilo\CoreBundle\Component\Utils\ChamiloApi;
+use Chamilo\CoreBundle\Entity\UserRelUser;
 
 /**
  * This class provides some functions for statistics.
@@ -1098,7 +1099,7 @@ class Statistics
                     LEFT JOIN $user_table u
                     ON (uf.user_id = u.id)
                     WHERE
-                        uf.relation_type <> '".USER_RELATION_TYPE_RRHH."' AND
+                        uf.relation_type <> '".UserRelUser::USER_RELATION_TYPE_RRHH."' AND
                         uf.user_id = url.user_id AND
                         access_url_id = '".$urlId."'
                     GROUP BY uf.user_id
@@ -1108,7 +1109,7 @@ class Statistics
                     FROM $user_friend_table uf
                     LEFT JOIN $user_table u
                     ON (uf.user_id = u.id)
-                    WHERE uf.relation_type <> '".USER_RELATION_TYPE_RRHH."'
+                    WHERE uf.relation_type <> '".UserRelUser::USER_RELATION_TYPE_RRHH."'
                     GROUP BY uf.user_id
                     ORDER BY count_friend DESC ";
         }
diff --git a/public/main/inc/lib/usermanager.lib.php b/public/main/inc/lib/usermanager.lib.php
index aee6199114..3e6fa0abed 100644
--- a/public/main/inc/lib/usermanager.lib.php
+++ b/public/main/inc/lib/usermanager.lib.php
@@ -4494,7 +4494,7 @@ class UserManager
         return self::subscribeUsersToUser(
             $hr_dept_id,
             $users_id,
-            USER_RELATION_TYPE_RRHH,
+            UserRelUser::USER_RELATION_TYPE_RRHH,
             false,
             $deleteOtherAssignedUsers
         );
diff --git a/public/main/social/group_add.php b/public/main/social/group_add.php
index ad2d5b6887..6af14d91f3 100644
--- a/public/main/social/group_add.php
+++ b/public/main/social/group_add.php
@@ -45,12 +45,12 @@ $interbreadcrumb[] = ['url' => 'groups.php', 'name' => get_lang('Groups')];
 $interbreadcrumb[] = ['url' => '#', 'name' => $nameTools];
 
 $social_avatar_block = SocialManager::show_social_avatar_block('group_add');
-$social_menu_block = SocialManager::show_social_menu('group_add');
+//$social_menu_block = SocialManager::show_social_menu('group_add');
 
 $tpl = new Template(null);
 SocialManager::setSocialUserBlock($tpl, api_get_user_id(), null, null);
 $tpl->setHelp('Groups');
-$tpl->assign('social_menu_block', $social_menu_block);
+//$tpl->assign('social_menu_block', $social_menu_block);
 $tpl->assign('social_right_content', $form->returnForm());
 
 $social_layout = $tpl->get_template('social/add_groups.tpl');
diff --git a/public/main/social/group_edit.php b/public/main/social/group_edit.php
index fe944507fe..f25228cd1c 100644
--- a/public/main/social/group_edit.php
+++ b/public/main/social/group_edit.php
@@ -57,7 +57,7 @@ if ($form->validate()) {
     exit();
 }
 
-$social_left_content = SocialManager::show_social_menu('group_edit', $group_id);
+//$social_left_content = SocialManager::show_social_menu('group_edit', $group_id);
 $social_right_content = $form->returnForm();
 
 $tpl = new Template(get_lang('Edit'));
@@ -65,7 +65,7 @@ $tpl = new Template(get_lang('Edit'));
 SocialManager::setSocialUserBlock($tpl, api_get_user_id(), 'groups', $group_id);
 
 $tpl->setHelp('Groups');
-$tpl->assign('social_menu_block', $social_left_content);
+//$tpl->assign('social_menu_block', $social_left_content);
 $tpl->assign('social_right_content', $social_right_content);
 
 $social_layout = $tpl->get_template('social/add_groups.tpl');
diff --git a/public/main/social/group_invitation.php b/public/main/social/group_invitation.php
index c4aebb0fb4..18badc7c30 100644
--- a/public/main/social/group_invitation.php
+++ b/public/main/social/group_invitation.php
@@ -199,8 +199,6 @@ if (is_array($members) && count($members) > 0) {
 
 $tpl = new Template(null);
 SocialManager::setSocialUserBlock($tpl, api_get_user_id(), 'groups', $group_id);
-$social_menu_block = SocialManager::show_social_menu('member_list', $group_id);
-$tpl->assign('social_menu_block', $social_menu_block);
 $tpl->setHelp('Groups');
 $tpl->assign('social_right_content', $social_right_content);
 $social_layout = $tpl->get_template('social/add_groups.tpl');
diff --git a/public/main/social/group_topics.php b/public/main/social/group_topics.php
index 2293937d86..0b4383876d 100644
--- a/public/main/social/group_topics.php
+++ b/public/main/social/group_topics.php
@@ -182,7 +182,7 @@ $interbreadcrumb[] = ['url' => 'groups.php', 'name' => get_lang('Groups')];
 $interbreadcrumb[] = ['url' => 'group_view.php?id='.$group_id, 'name' => Security::remove_XSS($group_info['name'])];
 $interbreadcrumb[] = ['url' => '#', 'name' => get_lang('Discussions')];
 
-$social_left_content = SocialManager::show_social_menu('member_list', $group_id);
+$social_left_content = null; //SocialManager::show_social_menu('member_list', $group_id);
 $show_message = null;
 if (!empty($show_message)) {
     $social_right_content .= Display::return_message($show_message, 'confirmation');
@@ -194,13 +194,13 @@ $group_message = MessageManager::display_message_for_group(
     $message_id
 );
 
-$social_menu_block = SocialManager::show_social_menu('member_list', $group_id);
+//$social_menu_block = SocialManager::show_social_menu('member_list', $group_id);
 
 $tpl = new Template(null);
 $tpl->setHelp('Groups');
 // Block Social Avatar
 SocialManager::setSocialUserBlock($tpl, api_get_user_id(), 'groups', $group_id);
-$tpl->assign('social_menu_block', $social_menu_block);
+$tpl->assign('social_menu_block', '');
 $tpl->assign('social_friend_block', $friend_html);
 $tpl->assign('group_message', $group_message);
 $tpl->assign('social_right_content', $social_right_content);
diff --git a/public/main/social/group_view.php b/public/main/social/group_view.php
index 785bf173f8..ccd8cdc7e9 100644
--- a/public/main/social/group_view.php
+++ b/public/main/social/group_view.php
@@ -338,13 +338,13 @@ $tpl = new Template(null);
 // Block Social Avatar
 SocialManager::setSocialUserBlock($tpl, api_get_user_id(), 'groups', $group_id);
 
-$social_menu_block = SocialManager::show_social_menu('groups', $group_id);
+//$social_menu_block = SocialManager::show_social_menu('groups', $group_id);
 $tpl->setHelp('Groups');
 $tpl->assign('create_link', $create_thread_link);
 $tpl->assign('is_group_member', $is_group_member);
 $tpl->assign('group_info', $groupInfo);
 $tpl->assign('social_friend_block', $friend_html);
-$tpl->assign('social_menu_block', $social_menu_block);
+//$tpl->assign('social_menu_block', $social_menu_block);
 $tpl->assign('social_forum', $socialForum);
 $tpl->assign('social_right_content', $social_right_content);
 $tpl->assign('list_members', $listMembers);
diff --git a/public/main/social/group_waiting_list.php b/public/main/social/group_waiting_list.php
index d6d6f8ff6e..e151fed607 100644
--- a/public/main/social/group_waiting_list.php
+++ b/public/main/social/group_waiting_list.php
@@ -111,8 +111,7 @@ if (empty($new_member_list) > 0) {
 $tpl = new Template(null);
 
 SocialManager::setSocialUserBlock($tpl, api_get_user_id(), 'groups', $group_id);
-$social_menu_block = SocialManager::show_social_menu('member_list', $group_id);
-$tpl->assign('social_menu_block', $social_menu_block);
+
 $tpl->setHelp('Groups');
 $tpl->assign('members', $new_member_list);
 $tpl->assign('social_right_content', $social_right_content);
diff --git a/public/main/social/invitations.php b/public/main/social/invitations.php
deleted file mode 100644
index 96a5fa1a36..0000000000
--- a/public/main/social/invitations.php
+++ /dev/null
@@ -1,241 +0,0 @@
-<?php
-
-/* For licensing terms, see /license.txt */
-
-/**
- * @author Julio Montoya <gugli100@gmail.com>
- */
-$cidReset = true;
-require_once __DIR__.'/../inc/global.inc.php';
-
-api_block_anonymous_users();
-
-if ('true' !== api_get_setting('allow_social_tool')) {
-    api_not_allowed(true);
-}
-
-$this_section = SECTION_SOCIAL;
-
-$interbreadcrumb[] = ['url' => 'profile.php', 'name' => get_lang('Social network')];
-$interbreadcrumb[] = ['url' => '#', 'name' => get_lang('Invitations')];
-
-$userGroupModel = new UserGroupModel();
-
-if (is_array($_GET) && count($_GET) > 0) {
-    foreach ($_GET as $key => $value) {
-        switch ($key) {
-            case 'accept':
-                $useRole = $userGroupModel->get_user_group_role(api_get_user_id(), $value);
-
-                if (in_array(
-                    $useRole,
-                    [
-                        GROUP_USER_PERMISSION_PENDING_INVITATION_SENT_BY_USER,
-                        GROUP_USER_PERMISSION_PENDING_INVITATION,
-                    ]
-                )) {
-                    $userGroupModel->update_user_role(api_get_user_id(), $value, GROUP_USER_PERMISSION_READER);
-
-                    Display::addFlash(
-                        Display::return_message(get_lang('User is subscribed to this group'), 'success')
-                    );
-
-                    header('Location: '.api_get_path(WEB_CODE_PATH).'social/invitations.php');
-                    exit;
-                }
-
-                if (in_array(
-                    $useRole,
-                    [
-                        GROUP_USER_PERMISSION_READER,
-                        GROUP_USER_PERMISSION_ADMIN,
-                        GROUP_USER_PERMISSION_MODERATOR,
-                    ]
-                )) {
-                    Display::addFlash(
-                        Display::return_message(get_lang('User is already subscribed to this group'), 'warning')
-                    );
-
-                    header('Location: '.api_get_path(WEB_CODE_PATH).'social/invitations.php');
-                    exit;
-                }
-
-                Display::addFlash(
-                    Display::return_message(get_lang('User is not subscribed to this group'), 'warning')
-                );
-
-                header('Location: '.api_get_path(WEB_CODE_PATH).'social/invitations.php');
-                exit;
-                break;
-            case 'deny':
-                $userGroupModel->delete_user_rel_group(api_get_user_id(), $value);
-
-                Display::addFlash(
-                    Display::return_message(get_lang('Group invitation was denied'))
-                );
-
-                header('Location: '.api_get_path(WEB_CODE_PATH).'social/invitations.php');
-                exit;
-        }
-    }
-}
-
-$content = '';
-
-// Block Menu Social
-$social_menu_block = SocialManager::show_social_menu('invitations');
-// Block Invitations
-$socialInvitationsBlock = '<div id="id_response" align="center"></div>';
-
-$user_id = api_get_user_id();
-$list_get_invitation = SocialManager::get_list_invitation_of_friends_by_user_id($user_id);
-$list_get_invitation_sent = SocialManager::get_list_invitation_sent_by_user_id($user_id);
-$pending_invitations = $userGroupModel->get_groups_by_user(
-    $user_id,
-    GROUP_USER_PERMISSION_PENDING_INVITATION
-);
-$numberLoop = count($list_get_invitation);
-
-$total_invitations = $numberLoop + count($list_get_invitation_sent) + count($pending_invitations);
-
-if (count($_GET) <= 0) {
-    $socialInvitationsBlock .= '<div class="row">
-        <div class="col-md-12">
-            <a class="btn btn-success" href="search.php"><em class="fa fa-search"></em> '.
-                get_lang('Try and find some friends').'
-            </a>
-            </div>
-        </div><br />';
-}
-
-if (0 != $numberLoop) {
-    $invitationHtml = '';
-    foreach ($list_get_invitation as $invitation) {
-        $sender_user_id = $invitation['user_sender_id'];
-        $user_info = api_get_user_info($sender_user_id);
-        $userPicture = $user_info['avatar'];
-        $invitationHtml .= '<div id="id_'.$sender_user_id.'" class="block-invitation">';
-
-        $title = Security::remove_XSS($invitation['title'], STUDENT, true);
-        $content = Security::remove_XSS($invitation['content'], STUDENT, true);
-        $date = Display::dateToStringAgoAndLongDate($invitation['send_date']);
-        $invitationHtml .= '<div class="row">';
-        $invitationHtml .= '<div class="col-md-2">';
-        $invitationHtml .= '<a href="profile.php?u='.$sender_user_id.'">';
-        $invitationHtml .= '<img class="img-responsive img-rounded" src="'.$userPicture.'"/></a>';
-        $invitationHtml .= '</div>';
-        $invitationHtml .= '<div class="col-md-10">';
-
-        $invitationHtml .= '<div class="pull-right">';
-        $invitationHtml .= '<div class="btn-group btn-group-sm" role="group">';
-        $invitationHtml .= Display::toolbarButton(
-            null,
-            api_get_path(WEB_AJAX_PATH).'social.ajax.php?'.http_build_query([
-                'a' => 'add_friend',
-                'friend_id' => $sender_user_id,
-                'is_my_friend' => 'friend',
-            ]),
-            'check',
-            'primary',
-            ['id' => 'btn-accept-'.$sender_user_id]
-        );
-        $invitationHtml .= Display::toolbarButton(
-            null,
-            api_get_path(WEB_AJAX_PATH).'social.ajax.php?'.http_build_query([
-                'a' => 'deny_friend',
-                'denied_friend_id' => $sender_user_id,
-            ]),
-            'times',
-            'danger',
-            ['id' => 'btn-deny-'.$sender_user_id]
-        );
-        $invitationHtml .= '</div>';
-        $invitationHtml .= '</div>';
-
-        $invitationHtml .= '<h5 class="title-profile"><a href="profile.php?u='.$sender_user_id.'">
-                            '.$user_info['complete_name'].'</a>:
-                            </h5>';
-        $invitationHtml .= '<div class="content-invitation">'.$content.'</div>';
-        $invitationHtml .= '<div class="date-invitation">'.get_lang('Sent').' : '.$date.'</div>';
-
-        $invitationHtml .= '</div>';
-        $invitationHtml .= '</div></div>';
-    }
-    $socialInvitationsBlock .= Display::panel($invitationHtml, get_lang('Invitation received'));
-}
-
-if (count($list_get_invitation_sent) > 0) {
-    $invitationSentHtml = '';
-    foreach ($list_get_invitation_sent as $invitation) {
-        $sender_user_id = $invitation['user_receiver_id'];
-        $user_info = api_get_user_info($sender_user_id);
-        $invitationSentHtml .= '<div id="id_'.$sender_user_id.'" class="well">';
-        $title = Security::remove_XSS($invitation['title'], STUDENT, true);
-        $content = Security::remove_XSS($invitation['content'], STUDENT, true);
-
-        $invitationSentHtml .= '<div class="row">';
-        $invitationSentHtml .= '<div class="col-md-3">';
-        $invitationSentHtml .= '<a href="profile.php?u='.$sender_user_id.'">';
-        $invitationSentHtml .= '<img class="img-responsive img-rounded" src="'.$user_info['avatar'].'" /></a>';
-        $invitationSentHtml .= '</div>';
-        $invitationSentHtml .= '<div class="col-md-9">';
-        $invitationSentHtml .= '<h4 class="title-profile">
-            <a class="profile_link" href="profile.php?u='.$sender_user_id.'">'.$user_info['complete_name'].'</a></h4>';
-        $invitationSentHtml .= '<div class="content-invitation">'.$title.' : '.$content.'</div>';
-        $invitationSentHtml .= '<div class="date-invitation">'.
-            get_lang('Sent').' : '.Display::dateToStringAgoAndLongDate($invitation['send_date']).'</div>';
-        $invitationSentHtml .= '</div>';
-        $invitationSentHtml .= '</div></div>';
-    }
-    $socialInvitationsBlock .= Display::panel($invitationSentHtml, get_lang('Invitation sent'));
-}
-
-if (count($pending_invitations) > 0) {
-    $new_invitation = [];
-    $waitingInvitation = '';
-    foreach ($pending_invitations as $invitation) {
-        $picture = $userGroupModel->get_picture_group(
-            $invitation['id'],
-            $invitation['picture'],
-            null,
-            GROUP_IMAGE_SIZE_BIG
-        );
-        $img = '<img class="img-responsive" src="'.$picture['file'].'" />';
-        $invitation['picture_uri'] = '<a href="group_view.php?id='.$invitation['id'].'">'.$img.'</a>';
-        $invitation['name'] = '<a href="group_view.php?id='.$invitation['id'].'">'.
-            cut($invitation['name'], 120, true).'</a>';
-        $invitation['description'] = cut($invitation['description'], 220, true);
-        $new_invitation[] = $invitation;
-        $waitingInvitation .= '<div class="panel-invitations"><div class="row">';
-        $waitingInvitation .= '<div class="col-md-3">'.$invitation['picture_uri'].'</div>';
-        $waitingInvitation .= '<div class="col-md-9">';
-        $waitingInvitation .= '<h4 class="tittle-profile">'.$invitation['name'].'</h4>';
-        $waitingInvitation .= '<div class="description-group">'.$invitation['description'].'</div>';
-        $waitingInvitation .= '<div class="btn-group" role="group">';
-        $waitingInvitation .= Display::toolbarButton(
-            get_lang('Accept invitation'),
-            api_get_path(WEB_CODE_PATH).'social/invitations.php?'.http_build_query(['accept' => $invitation['id']]),
-            'check',
-            'success',
-            ['id' => 'accept-invitation-'.$invitation['id']]
-        );
-        $waitingInvitation .= Display::toolbarButton(
-            get_lang('Deny invitation'),
-            api_get_path(WEB_CODE_PATH).'social/invitations.php?'.http_build_query(['deny' => $invitation['id']]),
-            'times',
-            'danger',
-            ['id' => 'deny-invitation-'.$invitation['id']]
-        );
-        $waitingInvitation .= '</div>';
-        $waitingInvitation .= '</div></div>';
-    }
-    $socialInvitationsBlock .= Display::panel($waitingInvitation, get_lang('Groups waiting for approval'));
-}
-
-$tpl = new Template(null);
-SocialManager::setSocialUserBlock($tpl, api_get_user_id(), 'invitations');
-$tpl->assign('social_menu_block', $social_menu_block);
-$tpl->assign('social_invitations_block', $socialInvitationsBlock);
-$tpl->assign('content', $content);
-$social_layout = $tpl->get_template('social/invitations.tpl');
-$tpl->display($social_layout);
diff --git a/public/main/social/new_promoted_message.php b/public/main/social/new_promoted_message.php
index 85e32b960b..554098ce12 100644
--- a/public/main/social/new_promoted_message.php
+++ b/public/main/social/new_promoted_message.php
@@ -219,7 +219,7 @@ $social_right_content = null;
 $social_left_content = '';
 
 // Block Social Menu
-$social_menu_block = SocialManager::show_social_menu('messages');
+//$social_menu_block = SocialManager::show_social_menu('messages');
 $social_right_content .= '<div class="row">';
 $social_right_content .= '<div class="col-md-12">';
 $social_right_content .= '<div class="actions">';
diff --git a/public/main/social/personal_data.php b/public/main/social/personal_data.php
index b1f38d24e5..14966ba632 100644
--- a/public/main/social/personal_data.php
+++ b/public/main/social/personal_data.php
@@ -231,7 +231,7 @@ $interbreadcrumb[] = ['url' => '#', 'name' => get_lang('Personal data')];
 $socialMenuBlock = '';
 if ($allowSocial) {
     // Block Social Menu
-    $socialMenuBlock = SocialManager::show_social_menu('personal-data');
+    //$socialMenuBlock = SocialManager::show_social_menu('personal-data');
 }
 
 // MAIN CONTENT