.nav{
border:1px solid #ccc;
border-width:1px 0;
list-style:none;
margin:0;
padding:0;
text-align:center;
}
.nav li{
display:inline;
}
.nav a{
display:inline-block;
padding:10px;
}
KOD
Kaynak: http://csswizardry.com/2011/01/create-a-centred-horizontal-navigation/
Demo: http://csswizardry.com/demos/centred-nav/
Veya bir başka örnek olarak;
http://www.w3schools.com/css/tryit.asp?filename=trycss_float5