diff --git a/main/admin/course_category.php b/main/admin/course_category.php
index 6f21b7b00e..40aa13cdcc 100755
--- a/main/admin/course_category.php
+++ b/main/admin/course_category.php
@@ -3,9 +3,7 @@
 /**
  * 	@package chamilo.admin
  */
-/**
- * Code
- */
+
 // name of the language file that needs to be included
 $language_file = 'admin';
 $cidReset = true;
@@ -83,10 +81,11 @@ if ($action == 'add' || $action == 'edit') {
         if (!empty($category)) {
             $form_title .= ' ' . get_lang('Into') . ' ' . Security::remove_XSS($category);
         }
-        $url = api_get_self().'?action='.Security::remove_XSS($action).'&category='.Security::remove_XSS($category).'&id='.$categoryId;
+        $url = api_get_self().'?action='.Security::remove_XSS($action).'&category='.Security::remove_XSS($category).'&id='.$category;
         $form = new FormValidator('course_category', 'post', $url);
         $form->addElement('header', '', $form_title);
         $form->addElement('hidden', 'formSent', 1);
+
         $form->addElement('text', 'code', get_lang("CategoryCode"));
         $form->addElement('text', 'name', get_lang("CategoryName"));
         $form->addRule('name', get_lang('PleaseEnterCategoryInfo'), 'required');
diff --git a/main/inc/lib/course_category.lib.php b/main/inc/lib/course_category.lib.php
index 8fbb1801a8..1b0773077a 100755
--- a/main/inc/lib/course_category.lib.php
+++ b/main/inc/lib/course_category.lib.php
@@ -101,7 +101,7 @@ function addNode($code, $name, $canHaveCourses, $parent_id)
     $tbl_category = Database::get_main_table(TABLE_MAIN_CATEGORY);
     $code = trim(Database::escape_string($code));
     $name = trim(Database::escape_string($name));
-    $parent_id = intval($parent_id);
+    $parent_id = trim(Database::escape_string($parent_id));
     $canHaveCourses = Database::escape_string($canHaveCourses);
     $code = generate_course_code($code);
 
@@ -109,7 +109,6 @@ function addNode($code, $name, $canHaveCourses, $parent_id)
     if (Database::num_rows($result)) {
         return false;
     }
-
     $result = Database::query("SELECT MAX(tree_pos) AS maxTreePos FROM $tbl_category");
     $row = Database::fetch_array($result);
     $tree_pos = $row['maxTreePos'] + 1;
@@ -142,7 +141,8 @@ function updateCategoryChildren($category)
     }
 
     $children_count = compterFils($category, 0) - 1;
-    Database::query("UPDATE $tbl_category SET children_count='$children_count' WHERE code='$category'");
+    $sql = "UPDATE $tbl_category SET children_count='$children_count' WHERE code='$category'";
+    Database::query($sql);
 }
 
 /**