<div class="navbar navbar-inverse navbar-fixed-top">

    <div class="navbar-inner">

      <div class="container">

      <a class="brand" href="#">Logo</a>

        <div class="nav-collapse collapse navbar-inverse-collapse">

          <ul class="nav">

            <li class="active"><a href="#">标题1</a></li>

            <li><a href="#">标题2</a></li>

            <li><a href="#">标题3</a></li>

            <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">下拉1 <b class="caret"></b></a>

              <ul class="dropdown-menu">

                <li><a href="#">选项1</a></li>

                <li><a href="#">选项2</a></li>

                <li><a href="#">选项3</a></li>

                <li class="divider"></li><!--分割线-->

                <li class="nav-header">选项4</li>

                <li><a href="#">选项5</a></li>

                <li><a href="#">选项6</a></li>

              </ul>

            </li>

          </ul><!--结束nav-->

          <!--搜索-->

          <form class="navbar-search pull-left" action="">

            <input type="text" class="search-query span2" placeholder="搜索">

          </form>

          <!--靠右浮动的nav-->

          <ul class="nav pull-right">

            <li><a href="#">标题1</a></li>

            <li class="divider-vertical"></li><!--分割线-->

            <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">下拉2 <b class="caret"></b></a>

              <ul class="dropdown-menu">

                <li><a href="#">选项</a></li>

                <li><a href="#">选项</a></li>

                <li><a href="#">选项</a></li>

                <li class="divider"></li>

                <li><a href="#">选项</a></li>

              </ul>

            </li>

          </ul>

        </div>

        <!-- /.nav-collapse -->

      </div>

    </div>

    <!-- /navbar-inner --> 

<a class="btn btn-navbar" data-toggle="collapse" data-target=".navbar-inverse-collapse">

<span class="icon-bar"></span>

<span class="icon-bar"></span>

<span class="icon-bar"></span>

</a>