Bootstrap 3: Two Input Navbar

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<nav class="navbar-inverse nav-upper">
  <div class="container-fluid">
   
  </div>
</nav>

<nav class="navbar navbar-inverse navbar-static-top navbar-lower">
  <div class="container-fluid">
 <ul class="nav navbar-upper">
      <li><a href="#">NAV-A-1</a>
      </li>
      <li><a href="#">NAV-A-2</a>
      </li>
    </ul>
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false"> <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
    </div>

    <div class="collapse navbar-collapse" id="navbar">
      <ul class="nav navbar-nav">
        <li><a href="#">NAV-B-1</a>
        </li>
        <li><a href="#">NAV-B-2</a>
        </li>
        <li><a href="#">NAV-B-3</a>
        </li>
        <li><a href="#">NAV-B-4</a>
        </li>
      </ul>
      
    </div>
  </div>
</nav>