CodePen

HTML

            
              <nav class="test">
          <ul class="rr">
            <li><a href="#">alpha</a></li>
            <li class="current"><a href="#">test</a></li>
            <li><a href="#">beta</a></li>
          </ul>
        </nav>
            
          
!
via HTML Inspector

CSS

            
              
html {
  overflow-x: hidden;
}
.rr {
  margin: 0;
  padding: 0;
  list-style: none;
}
body {
  background: url("http://4.bp.blogspot.com/-rdR6DcxR774/UHegmoBH_dI/AAAAAAAAA1Q/nvyXGy1Sq2g/s1600/Spring_alley.jpg") repeat;
  color: #222;
}
.test {
  padding: 20px;
  width: 100%;
  background: #fff;
  background: rgba(255,255,255,0.8);
  text-align: center;
}
.test li {
  display: inline-block;
  position: relative;
}
.test li a {
  display: block;
  font-size: 1.5em;
  margin: 0 10px;
  color: inherit;
  text-decoration: none;
}
.test li.current:before {
  content: "";
  position: absolute;
  bottom: -28px;
  right: 50%;
  width: 9999px; 
  height: 0; 
  border-top: 8px solid #fff; 
  border-top: 8px solid rgba(255,255,255,0.8); 
  border-right: 10px solid transparent;
}
.test li.current:after {
  content: "";
  position: absolute;
  bottom: -28px;
  left: 50%;
  width: 9999px; 
  height: 0; 
  border-top: 8px solid #fff; 
  border-top: 8px solid rgba(255,255,255,0.8); 
  border-left: 10px solid transparent;
}
            
          
!
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? ?
Must be a valid URL.
+ add another resource
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JS

            
              $(function() {

  var temp;
  $('.test li').hover(function() {
    temp = $(this).parent().children('.current')
    temp.removeClass('current');
    $(this).addClass('current');
  }, function() {
    $(this).removeClass('current');
    temp.addClass('current');
  });

});

            
          
!
Must be a valid URL.
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