<ul class="nav nav-tabs">
    <li>
      <a href="#">Home</a>
    </li>
    <li class="dropdown">
      <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdowns <i class="fa fa-caret-down"></i></a>
      <ul class="dropdown-menu">
        <li>
          <a href="#" tabindex="-1">Item</a>
        </li>
        <li>
         <a href="#" tabindex="-1">Item 2</a>
       </li>
      </ul>
    </li>
  </ul>