<style>
.horizontal-nav {
    width:100%;
    height:30px;
    padding: 0px;
    margin-bottom: 10px;
}
 
.horizontal-nav ul {
    margin: 0px;
    padding: 0px;
    float: left;
    text-align: center;
    border-radius: 6px;
    border: 1px solid #727272;
    background-image: -moz-linear-gradient(center bottom , #404040 0%, #5F5F5F 100%);
}
 
.horizontal-nav ul li {
    display: table-cell;
    float: left;
    margin: 0px;
    padding: 0px;
    border-left: 1px solid #727272;
}
 
.horizontal-nav ul li:first-child {
  border-left: 0 none;
}
 
.horizontal-nav ul li a {
    display: block;
    padding: 5px 30px;
    color: #fff;
    font: bold 12px Arial,Tahoma,Helvetica,sans-serif;
    text-decoration: none;
    border-top: 1px solid rgba(255,255,255, 0.25);
    border-left: 1px solid rgba(255,255,255, 0.25);
}
 
.horizontal-nav ul li:first-child a {
  border-left: 0 none;
}
 
.horizontal-nav ul li a:hover {
  background: #282828;
}
 
.horizontal-nav-a-selected {
  background: #282828;
}
 
.horizontal-nav ul li:first-child a {
  border-top-left-radius: 6px;
  border-bottom-left-radius: 6px;
}
 
.horizontal-nav ul li:last-child a {
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
}
 
</style>


<div class="horizontal-nav">
  <ul>
    <li><a href="#">Menu 1</a></li>
    <li><a class="horizontal-nav-a-selected" href="#">Menu 2</a></li>
    <li><a href="#">Menu 3</a></li>
    <li><a href="#">Menu 4</a></li>
    <li><a href="#">Menu 5</a></li>
  </ul>
</div>

http://function-code.blogspot.com/2014/11/css-navigation-bar.html

useful and simple css navigation menu bar.

css navigation menu bar

css, navigation

CSS