.tabrow
{ text-align: center;
  list-style: none;
  margin: 200px 0 20px;
  padding: 0;
  line-height: 24px;
  height: 26px;
  overflow: hidden;
  font-size: 12px;
  font-family: verdana;
  position: relative;
}

.tabrow li
{ border: 1px solid #AAA;
  background: #D1D1D1;
  background: -o-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
  background: -ms-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
  background: -moz-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
  background: -webkit-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
  background: linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
  display: inline-block;
  position: relative;
  z-index: 0;
  border-top-left-radius: 6px;
  border-top-right-radius: 6px;
  box-shadow: 0 3px 3px rgba(0, 0, 0, 0.4), inset 0 1px 0 #FFF;
  text-shadow: 0 1px #FFF;
  margin: 0 -5px;
  padding: 0 20px;
}

.tabrow a
{ color: #555;
  text-decoration: none;
}

.tabrow li.selected
{ background: #FFF;
  color: #333;
  z-index: 2;
  border-bottom-color: #FFF;
}

.tabrow:before
{ position: absolute;
  content: " ";
  width: 100%;
  bottom: 0;
  left: 0;
  border-bottom: 1px solid #AAA;
  z-index: 1;
}

.tabrow li:before,
.tabrow li:after
{ border: 1px solid #AAA;
  position: absolute;
  bottom: -1px;
  width: 5px;
  height: 5px;
  content: " ";
}

.tabrow li:before
{ left: -6px;
  border-bottom-right-radius: 6px;
  border-width: 0 1px 1px 0;
  box-shadow: 2px 2px 0 #D1D1D1;
}

.tabrow li:after
{ right: -6px;
  border-bottom-left-radius: 6px;
  border-width: 0 0 1px 1px;
  box-shadow: -2px 2px 0 #D1D1D1;
}

.tabrow li.selected:before
{ box-shadow: 2px 2px 0 #FFF;
}

.tabrow li.selected:after
{ box-shadow: -2px 2px 0 #FFF;
}

	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
	<script>
		$(function() {
			$("li").click(function(e) {
			  e.preventDefault();
			  $("li").removeClass("selected");
			  $(this).addClass("selected");
			});
		});
	</script>

	<ul class="tabrow">
	    <li><a href="#">Lorem</a></li>
	    <li><a href="#">Ipsum</a></li>
	    <li class="selected"><a href="#">Sit amet</a></li>
	    <li><a href="#">Consectetur adipisicing</a></li>
	</ul>