     <div id="navbar" class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
              <li class="active"><a href="#">Home</a></li>
              <li><a href="#">About</a></li>
              <li><a href="#">Contact</a></li>
              <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
                <ul class="dropdown-menu">
             