[bes]

<ul class="menu">
	<li class="active">
		<a href=""></a>
		<ul><li></li></ul>
	</li>
</ul>

<ul class="menu">
	<li class="active">
		<a href=""></a>
	</li>
</ul>

<script>
window.onload = function () {
	var elems = document.getElementsByClassName('active');//сделать кроссбраузерной
	var len = elems.length;
	for (var i = 0; i < len; i++) {
		if(elems[i].children[1].tagName == 'UL') {
			elems[i].children[0].innerHTML = 'link' + i;
		}
	}
}
</script>