JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div class="navbar ">
         <div class="container">
                    
            <ul class="nav pull-right">
            
              <li><a href="index.html"><b>Home</b></a></li>
              <li class="divider-vertical"></li>
              
              <li class="dropdown">
              <a href="#" class="dropdown-togle" data-toggle="dropdown">
              <b>Download</b>
              <b class="caret"></b></a>
              <ul class="dropdown-menu">
              <li><a href="downloading_link">link </a></li>
                <li><a href="downloading_link.html">link</a></li>
                </ul>
                </li>
 
              <li class="divider-vertical"></li>
              <li><a href="faq.html"><b>F.A.Q.</b></a></li>
              <li class="divider-vertical"></li>
              
              </li>     
            </ul>
        </div>     
            
      <!-- Main hero unit for a primary marketing message or call to action -->
      
            </div>
            
        </div>

CSS

.container {
  border-bottom: 1px solid #FFF;
}
ul.nav li.dropdown:hover ul.dropdown-menu {  
  display:block;    
  margin: 0px 0px 0px 10px;
  border-bottom: 1px solid #000;  
  border-left: 1px solid #000; 
  border-right: 1px solid #000; 
  border-top: none; 
  border-top-left-radius:0px;
}
.navbar .dropdown-menu:before, .navbar .dropdown-menu:after {
  border:none;   
}
.navbar .nav > li > a {
  margin: 0px 10px; 
  border-top: 1px solid #FFF;  
  border-left: 1px solid #FFF; 
  border-right: 1px solid #FFF; 
  border-top-right-radius: 5px; 
  border-top-left-radius: 5px;
  color: #000;
  text-shadow:none;
}
.navbar .nav > li > a:hover, .navbar .nav > li > a:active{
  border-top: 1px solid #000;  
  border-left: 1px solid #000; 
  border-right: 1px solid #000; 
  border-top-right-radius: 5px;  
  border-top-left-radius: 5px;
  color: #000;
  text-shadow:none;
}
a.menu:after, .dropdown-toggle:after {
    content: none;
}