Fix the Navigation style

docs/theme/base.html

@@ -188,15 +188,12 @@ a.fusion-poweredby {
             <div id="table-of-contents">
               <ul class="nav nav-list side-nav well sidebar-nav-fixed">
                 {% for toc_item in toc %}
-                    <li class="main {% if toc_item.active %}active{% endif %}"><a href="{{ toc_item.url }}">{{ toc_item.title }}</a></li>
-                    {% for toc_item in toc_item.children %}
-                        <li><a href="{{ toc_item.url }}">{{ toc_item.title }}</a></li>
-                    {% endfor %}
+                  <li class="{% if loop.first %}main{% endif %} {% if toc_item.active %}main{% endif %}"><a href="{{ toc_item.url }}">{{ toc_item.title }}</a></li>
                 {% endfor %}
               <div class="promo">
               {{ ad_block }}
               </div>
-</ul>
+              </ul>
 
             </div>
           </div>