<nav class="navbar navbar-default navbar-fixed-top">
            <div class="container">
             <div class="navbar-header">
               <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse">
                 
                  <span class="sr-only">Toggle navigation</span>
                         <span class="icon-bar"></span>
                           <span class="icon-bar"></span>
                             <span class="icon-bar"></span>
               </button>
               <a href="#" class="navbar-brand">Yoda learning</a>
             </div>  <!--end of navbar -header-->


             <div class="collapse navbar-collapse" id="bs-example-navbar-collapse">
               <ul class="nav navbar-nav">
                 <li class="active"><a href="#">Home</a></li>
                 <li><a href="">Contact us</a></li>
                 <li ><a href="blog.html">Blog</a></li>
                  <li class="dropdown" ><a  class="dropdown-toggle" data-toggle="dropdown" role="button" href="#">Nature <span class="caret"></span></a>

                    <ul class="dropdown-menu">
                      <li> <a href=""> Mountain</a></li>
                        <li> <a href=""> Desert</a></li>
                        <li> <a href=""> Earth</a></li>
                        <li class="divider"> </li>
                        <li class="dropdown-header">  Ocean</li>
                        <li> <a href=""> Fish</a></li>
                      </ul>




                  </li>
               </ul> <!--end of navbar -->

                <ul class="nav navbar-nav navbar-right">
                  <li class="dropdown"><a href="" class="dropdown-toggle" data-toggle="dropdown" role="button">
                    
                    My Account <span class="caret"></span>
                  </a>

                    <ul class="dropdown-menu">
                      <li><a href="">Setting</a></li>
                        <li><a href="">SignOut</a></li>
                    </ul>


                </li>
                </ul> <!--end of navbar right -->



             </div> <!--end of collapse-->
             


           </nav> <!-- End of navigation -->
</div>  <!-- End of container -->