https://github.com/NodeBB/NodeBB/issues/5116

templates/categories.tpl

@@ -1,7 +1,7 @@
 <!-- IMPORT partials/breadcrumbs.tpl -->
 <div widget-area="header"></div>
 <div class="row">
-	<div class="col-lg-9 col-sm-12" no-widget-class="col-lg-12 col-sm-12" no-widget-target="sidebar">
+	<div class="col-lg-12 col-sm-12" has-widget-class="col-lg-9 col-sm-12" has-widget-target="sidebar">
 		<h1 class="categories-title">[[pages:categories]]</h1>
 		<ul class="categories" itemscope itemtype="http://www.schema.org/ItemList">
 			<!-- BEGIN categories -->
@@ -9,6 +9,6 @@
 			<!-- END categories -->
 		</ul>
 	</div>
-	<div widget-area="sidebar" class="col-lg-3 col-sm-12"></div>
+	<div widget-area="sidebar" class="col-lg-3 col-sm-12 hidden"></div>
 </div>
 <div widget-area="footer"></div>

templates/category.tpl

@@ -1,7 +1,7 @@
 <!-- IMPORT partials/breadcrumbs.tpl -->
 <div widget-area="header"></div>
 <div class="row">
-	<div class="category col-lg-9 col-sm-12" no-widget-class="category col-lg-12 col-sm-12" no-widget-target="sidebar">
+	<div class="category col-lg-12 col-sm-12" has-widget-class="category col-lg-9 col-sm-12" has-widget-target="sidebar">
 		<!-- IMPORT partials/category/subcategory.tpl -->
 
 		<!-- IF children.length --><hr class="hidden-xs"/><!-- ENDIF children.length -->
@@ -38,7 +38,7 @@
 			<!-- IMPORT partials/paginator.tpl -->
 		<!-- ENDIF config.usePagination -->
 	</div>
-	<div widget-area="sidebar" class="col-lg-3 col-sm-12"></div>
+	<div widget-area="sidebar" class="col-lg-3 col-sm-12 hidden"></div>
 </div>
 <div widget-area="footer"></div>
 

templates/topic.tpl

@@ -1,7 +1,7 @@
 <!-- IMPORT partials/breadcrumbs.tpl -->
 <div widget-area="header"></div>
 <div class="row">
-	<div class="topic col-lg-9 col-sm-12" no-widget-class="topic col-lg-12 col-sm-12" no-widget-target="sidebar">
+	<div class="topic col-lg-12 col-sm-12" has-widget-class="topic col-lg-9 col-sm-12" has-widget-target="sidebar">
 
 		<h1 component="post/header" class="hidden-xs" itemprop="name">
 
@@ -52,7 +52,7 @@
 			</div>
 		</div>
 	</div>
-	<div widget-area="sidebar" class="col-lg-3 col-sm-12"></div>
+	<div widget-area="sidebar" class="col-lg-3 col-sm-12 hidden"></div>
 </div>
 <div widget-area="footer"></div>