do not forget to pass parameters to subtemplate

settings/templates/users/main.php

@@ -4,14 +4,16 @@
  * This file is licensed under the Affero General Public License version 3 or later.
  * See the COPYING-README file.
  */
+$userlistParams = array();
 $allGroups=array();
 foreach($_["groups"] as $group) {
 	$allGroups[] = $group['name'];
 }
-$_['subadmingroups'] = $allGroups;
-$items = array_flip($_['subadmingroups']);
+$userlistParams['subadmingroups'] = $allGroups;
+$userlistParams['allGroups'] = json_encode($allGroups);
+$items = array_flip($userlistParams['subadmingroups']);
 unset($items['admin']);
-$_['subadmingroups'] = array_flip($items);
+$userlistParams['subadmingroups'] = array_flip($items);
 ?>
 
 <script type="text/javascript" src="<?php print_unescaped(OC_Helper::linkToRoute('isadmin'));?>"></script>
@@ -25,5 +27,5 @@ $_['subadmingroups'] = array_flip($items);
 
 <div id="app-content">
 	<?php print_unescaped($this->inc('users/part.createuser')); ?>
-	<?php print_unescaped($this->inc('users/part.userlist')); ?>
+	<?php print_unescaped($this->inc('users/part.userlist', $userlistParams)); ?>
 </div>

settings/templates/users/part.userlist.php

@@ -1,4 +1,4 @@
-<table class="hascontrols grid" data-groups="<?php p(json_encode($allGroups));?>">
+<table class="hascontrols grid" data-groups="<?php p($_['allGroups']);?>">
 	<thead>
 		<tr>
 			<?php if ($_['enableAvatars']): ?>