alaasema

Nice code, you can also do it simply using CSS only, without need to any JS code.
The trick here is treating the list as a table

.ui-tabs .ui-tabs-nav{
	display: table;
}
.ui-tabs .ui-tabs-nav li{
	display: table-cell;
	position: static;
	float:none;
}

That’s it, it works with any list or div menu.