<div class="dropdown">
<button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example
<span class="caret"></span></button>
<ul class="dropdown-menu">
<li><a href="#">Option One</a></li>
<li><a href="#">Option two</a></li>
<li><a href="#">More Options</a></li>
</ul>
</div>