diff --git a/pandora_console/include/class/TreeGroup.class.php b/pandora_console/include/class/TreeGroup.class.php
index dbc48b9296..a5b9757fba 100644
--- a/pandora_console/include/class/TreeGroup.class.php
+++ b/pandora_console/include/class/TreeGroup.class.php
@@ -391,37 +391,29 @@ class TreeGroup extends Tree
             $groups[$group['id']] = $group;
         }
 
-        // Build the module hierarchy
+        // Build the module hierarchy.
         foreach ($groups as $id => $group) {
-            if (isset($groups[$id]['parent']) && ($groups[$id]['parent'] != 0)) {
+            if (isset($groups[$id]['parent']) === true && ($groups[$id]['parent'] != 0)) {
                 $parent = $groups[$id]['parent'];
-                // Parent exists
-                if (!isset($groups[$parent]['children'])) {
+                // Parent exists.
+                if (isset($groups[$parent]['children']) === true) {
                     $groups[$parent]['children'] = [];
                 }
 
-                // Store a reference to the group into the parent
+                // Store a reference to the group into the parent.
                 $groups[$parent]['children'][] = &$groups[$id];
-                // This group was introduced into a parent
+                // This group was introduced into a parent.
                 $groups[$id]['have_parent'] = true;
             }
         }
 
-        // Sort the children groups
+        // Sort the children groups.
         foreach ($groups as $id => $group) {
-            if (isset($groups[$id]['children'])) {
+            if (isset($groups[$id]['children']) === true) {
                 usort($groups[$id]['children'], ['Tree', 'cmpSortNames']);
             }
         }
 
-        // Filter groups and eliminates the reference to children groups out of her parent
-        $groups = array_filter(
-            $groups,
-            function ($group) {
-                return !($group['have_parent'] ?? false);
-            }
-        );
-
         return array_values($groups);
     }
 
diff --git a/pandora_console/operation/tree.php b/pandora_console/operation/tree.php
index 7f86bce105..ece2266800 100755
--- a/pandora_console/operation/tree.php
+++ b/pandora_console/operation/tree.php
@@ -329,7 +329,7 @@ html_print_image(
 echo "<div id='tree-controller-recipient'>";
 echo '</div>';
 
-if (is_metaconsole()) {
+if (is_metaconsole() === true) {
     echo '</div>';
 }
 
@@ -337,7 +337,7 @@ enterprise_hook('close_meta_frame');
 
 ?>
 
-<?php if (!is_metaconsole()) { ?>
+<?php if (is_metaconsole() === false) { ?>
 <script type="text/javascript" src="include/javascript/fixed-bottom-box.js"></script>
 <?php } else { ?>
 <script type="text/javascript" src="../../include/javascript/fixed-bottom-box.js"></script>
@@ -347,12 +347,12 @@ enterprise_hook('close_meta_frame');
     var treeController = TreeController.getController();
 
     processTreeSearch();
-    
+
     $("form#tree_search").submit(function(e) {
         e.preventDefault();
         processTreeSearch();
     });
-    
+
     function processTreeSearch () {
         // Clear the tree
         if (typeof treeController.recipient != 'undefined' && treeController.recipient.length > 0)