Dropdowns
<ul class="nav nav-pills">
<li class="dropdown" id="menu1">
<a class="dropdown-toggle" data-toggle="dropdown" href="#menu1">Dropdown
<strong class="caret"></strong>
</a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
</ul>
</li>
</ul>
<div class="btn-group">
<button class="btn dropdown-toggle" data-toggle="dropdown">Action <span class="caret"></span></button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
</ul>
</div>
Split button dropdowns
<div class="btn-group">
<button class="btn">Action</button>
<button data-toggle="dropdown" class="btn dropdown-toggle"><span class="caret"></span></button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
</ul>
</div>