Dropdown example 1



<!-- Dropdown Trigger -->
<button type="button" class="btn btn-default dropdown-button" href="#" data-activates="dropdown1">Drop Me!</button>

  <!-- Dropdown Structure -->
  <ul id='dropdown1' class='dropdown-content'>
    <li><a href="#!">one</a></li>
    <li><a href="#!">two</a></li>
    <li class="divider"></li>
    <li><a href="#!">three</a></li>
  </ul>

Dropdown example 2



<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="#">HTML</a></li>
    <li><a href="#">CSS</a></li>
    <li><a href="#">JavaScript</a></li>
  </ul>
</div>