bootstrap-select/docs/custom_theme/toc.html

Bootstrap-select is a jQuery plugin that utilizes Bootstrap's dropdown.js to style and bring additional functionality to standard select elements.

<div class="bs-sidebar hidden-print affix-top" role="complementary">
    <ul class="nav bs-sidenav">
    {% for toc_item in toc %}
        <li class="main {% if toc_item.active %}active{% endif %}">
	        <a href="{{ toc_item.url }}">{{ toc_item.title }}</a>
	        <ul class="nav">
	        {% for toc_item in toc_item.children %}
	            <li><a href="{{ toc_item.url }}">{{ toc_item.title }}</a></li>
	        {% endfor %}
	        </ul>
        </li>
    {% endfor %}
    </ul>
</div>