diff --git a/vanilla/applications/vanilla/controllers/class.categoriescontroller.php b/vanilla/applications/vanilla/controllers/class.categoriescontroller.php
index 6bcaff8..d8695d7 100644
--- a/vanilla/applications/vanilla/controllers/class.categoriescontroller.php
+++ b/vanilla/applications/vanilla/controllers/class.categoriescontroller.php
@@ -422,7 +422,12 @@ public function index($categoryIdentifier = '', $page = '0') {
                 $this->addModule('NewDiscussionModule');
             }
             $this->addModule('DiscussionFilterModule');
-          //  $this->addModule('CategoriesModule');
+            // FIX: https://github.com/topcoder-platform/forums/issues/548
+            // Show only for 'Public forums'
+            $isGroupCategory = val('GroupID',$category, false);
+            if(gdn::session()->isValid() && !$isGroupCategory) {
+                $this->addModule('CategoriesModule');
+            }
             $this->addModule('BookmarkedModule');
             $this->addModule('TagModule');
 
@@ -653,7 +658,13 @@ public function all($Category = '', $displayAs = '') {
         }
         $this->addModule('DiscussionFilterModule');
         $this->addModule('BookmarkedModule');
-      //  $this->addModule('CategoriesModule');
+        // FIX: https://github.com/topcoder-platform/forums/issues/548
+        // Show only for 'Public forums'
+        $isGroupCategory = val('GroupID',$this->data('Category'));
+        if(gdn::session()->isValid() && $this->data('Category') && !$isGroupCategory) {
+            $this->addModule('CategoriesModule');
+        }
+
         $this->addModule($CategoryFollowToggleModule);
         $this->addModule('TagModule');
 
@@ -745,7 +756,12 @@ public function discussions($Category = '') {
         // Add modules
         $this->addModule('NewDiscussionModule');
         $this->addModule('DiscussionFilterModule');
-     //   $this->addModule('CategoriesModule');
+        // FIX: https://github.com/topcoder-platform/forums/issues/548
+        // Show only for 'Public forums'
+        $isGroupCategory = val('GroupID',$Category, false);
+        if(gdn::session()->isValid() && $Category && !$isGroupCategory) {
+            $this->addModule('CategoriesModule');
+        }
         $this->addModule('BookmarkedModule');
         $this->addModule($CategoryFollowToggleModule);
 
diff --git a/vanilla/applications/vanilla/controllers/class.discussioncontroller.php b/vanilla/applications/vanilla/controllers/class.discussioncontroller.php
index 78e40e9..87bc460 100644
--- a/vanilla/applications/vanilla/controllers/class.discussioncontroller.php
+++ b/vanilla/applications/vanilla/controllers/class.discussioncontroller.php
@@ -297,7 +297,14 @@ public function index($DiscussionID = '', $DiscussionStub = '', $Page = '') {
         // Add modules
         $this->addModule('DiscussionFilterModule');
         $this->addModule('NewDiscussionModule');
-       // $this->addModule('CategoriesModule');
+
+        // FIX: https://github.com/topcoder-platform/forums/issues/548
+        // Show only for 'Public forums'
+        $isGroupDiscussion = val('GroupID',$Category, false);
+        if(gdn::session()->isValid() && !$isGroupDiscussion) {
+            $this->addModule('CategoriesModule');
+        }
+
         $this->addModule('BookmarkedModule');
 
         $this->CanEditComments = Gdn::session()->checkPermission('Vanilla.Comments.Edit', true, 'Category', 'any') && c('Vanilla.AdminCheckboxes.Use');
diff --git a/vanilla/applications/vanilla/controllers/class.postcontroller.php b/vanilla/applications/vanilla/controllers/class.postcontroller.php
index 5ffd811..85ea106 100644
--- a/vanilla/applications/vanilla/controllers/class.postcontroller.php
+++ b/vanilla/applications/vanilla/controllers/class.postcontroller.php
@@ -158,6 +158,12 @@ public function discussion($categoryUrlCode = '', $announce = '') {
 
         $categoryData = $this->ShowCategorySelector ? CategoryModel::categories() : false;
 
+        $isGroupCategory = val('GroupID',$category, false);
+        if($category && !$isGroupCategory) {
+            $this->addModule('CategoriesModule');
+        }
+
+
         // Check permission
         if (isset($this->Discussion)) {
             $this->setData('ShowPreviewButton', $this->Discussion->Format != 'Rich');
@@ -496,6 +502,7 @@ public function editDiscussion($discussionID = '', $draftID = '') {
      * @param int $DiscussionID Unique ID to add the comment to. If blank, this method will throw an error.
      */
     public function comment($DiscussionID = '') {
+
         // Get $DiscussionID from RequestArgs if valid
         if ($DiscussionID == '' && count($this->RequestArgs)) {
             if (is_numeric($this->RequestArgs[0])) {
@@ -1030,7 +1037,6 @@ public function initialize() {
         // Add modules
         $this->addModule('NewDiscussionModule');
         $this->addModule('DiscussionFilterModule');
-        // $this->addModule('CategoriesModule');
         $this->addModule('BookmarkedModule');
 
         parent::initialize();
diff --git a/vanilla/applications/vanilla/modules/class.categoriesmodule.php b/vanilla/applications/vanilla/modules/class.categoriesmodule.php
index 437836a..a3f89c8 100644
--- a/vanilla/applications/vanilla/modules/class.categoriesmodule.php
+++ b/vanilla/applications/vanilla/modules/class.categoriesmodule.php
@@ -71,14 +71,12 @@ protected function getData() {
      * @return array
      */
     private function filterCategories($categories) {
-        //Don't show `Challenges Forums` in the menu
-        $groupModel = new GroupModel();
-        $challengesForumsCategory = $groupModel->getChallengesForums();
-        $challengesForumsCategoryID = val('CategoryID',$challengesForumsCategory);
-
+        $hiddenCategories = ['challenges-forums', 'groups'];
         foreach ($categories as &$category) {
             $categoryID = $category['CategoryID'];
-            $category['isDisplayed'] = $challengesForumsCategoryID != $categoryID;
+            $categoryUrlCode = $category['UrlCode'];
+            $isHidden = in_array($categoryUrlCode, $hiddenCategories);
+            $category['isDisplayed'] = !$isHidden;
         }
 
         return array_filter($categories, function($e) {
diff --git a/vanilla/applications/vanilla/views/modules/categories.php b/vanilla/applications/vanilla/views/modules/categories.php
index ae60fed..991a294 100755
--- a/vanilla/applications/vanilla/views/modules/categories.php
+++ b/vanilla/applications/vanilla/views/modules/categories.php
@@ -8,12 +8,12 @@
     }
     ?>
     <div class="Box BoxCategories">
-        <?php echo panelHeading(t('Categories')); ?>
+        <?php echo panelHeading(t('Public Forums Topics')); ?>
         <ul class="PanelInfo PanelCategories">
             <?php
-            echo '<li'.($OnCategories ? ' class="Active"' : '').'>'.
-                anchor(t('All Categories'), '/categories', 'ItemLink')
-                .'</li>';
+           // echo '<li'.($OnCategories ? ' class="Active"' : '').'>'.
+           //     anchor(t('All Categories'), '/categories', 'ItemLink')
+           //     .'</li>';
 
             $MaxDepth = c('Vanilla.Categories.MaxDisplayDepth');
 
@@ -24,13 +24,21 @@
                 $attributes = false;
 
                 if ($Category->DisplayAs === 'Heading') {
-
                     $CssClass = 'Heading '.$Category->CssClass;
                     $attributes = ['aria-level' => $Category->Depth + 2];
                 } else {
-                    $CssClass = 'Depth'.$Category->Depth.($CategoryID == $Category->CategoryID ? ' Active' : '').' '.$Category->CssClass;
-                }
+                    //$isActive = $CategoryID == $Category->CategoryID;
+                    $ancestors = CategoryModel::getAncestors($CategoryID);
+                    $isActive = false;
+                    foreach ($ancestors as $id => $ancestor) {
+                        if($id == $Category->CategoryID) {
+                            $isActive = true;
+                            break;
+                        }
+                    }
 
+                    $CssClass = 'Depth'.$Category->Depth.($isActive ? ' Active' : '').' '.$Category->CssClass;
+                }
 
                 if (is_array($attributes)) {
                     $attributes = attribute($attributes);