bootstrap 多级菜单 注册登录

    <header role="banner">
      <div class="container">
        <a class="banner-brand visible-md visible-lg" href="index.html"><img src="img/logo.png" alt="Bootstrappin'" width="180"></a>
        <div class="utility-nav">
          <ul>
            <li><a href="#" title="Login or Register"><i class="icon fa fa-user fa-lg"></i> <span>Log In or Register</span></a></li>
            <li><a href="#" title="View Cart"><i class="icon fa fa-shopping-cart fa-lg"></i> <span>View Cart</span></a></li>
          </ul>
        </div><!-- /.utility-nav -->
      </div><!-- /.container -->
        <nav role="navigation" class="navbar navbar-default">
          <div class="container">
            <div class="navbar-header">
              <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
              </button>
              <a class="navbar-brand visible-xs visible-sm" href="index.html"><img src="img/logo.png" alt="Bootstrappin'" width="120"></a>
            </div>
            <div class="navbar-collapse collapse">
              <ul class="nav navbar-nav">
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Shoes <b class="caret"></b></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>
                      <li class="divider"></li>
                      <li><a href="#">Separated link</a></li>
                      <li class="divider"></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                </li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Clothing <b class="caret"></b></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>
                      <li class="divider"></li>
                      <li><a href="#">Separated link</a></li>
                      <li class="divider"></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                </li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Accessories <b class="caret"></b></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>
                      <li class="divider"></li>
                      <li><a href="#">Separated link</a></li>
                      <li class="divider"></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                </li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Men <b class="caret"></b></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>
                      <li class="divider"></li>
                      <li><a href="#">Separated link</a></li>
                      <li class="divider"></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                </li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Women <b class="caret"></b></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>
                      <li class="divider"></li>
                      <li><a href="#">Separated link</a></li>
                      <li class="divider"></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                </li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Kids <b class="caret"></b></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>
                      <li class="divider"></li>
                      <li><a href="#">Separated link</a></li>
                      <li class="divider"></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                </li>
              </ul>
              <ul class="nav navbar-nav navbar-right">
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">All Departments <b class="caret"></b></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>
                      <li class="divider"></li>
                      <li><a href="#">Separated link</a></li>
                      <li class="divider"></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                </li>
              </ul>
            </div><!--/.nav-collapse -->
          </div><!--/.container -->
        </nav>
    </header>