katamason,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.item-with-ul ul{display:none}
.item-with-ul ul.show_with{display:block}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
$(function() {
$(".item-with-ul ul").each(function(b, a) {
$(a).prev().click(function() {
$(a).toggleClass("show_with")
})
})
});
</script>
</head>
<body> <div class="topmenu">
<ul >
<li class="">
<a href="#" class="">Itemmenu empty</a>
</li>
<li class="item-with-ul">
<a href="#" class="touch-with">Itemmenu</a>
<ul >
<li><a href="#">Subitem1</a></li>
<li><a href="#">Subitem1</a></li>
<li><a href="#">Subitem2</a></li>
</ul>
</li>
<li class="item-with-ul">
<a href="#" class="touch-with">Itemmenu</a>
<ul class="item-with-ul">
<li><a href="#">Subitem1</a></li>
<li><a href="#">Subitem1</a></li>
<li><a href="#">Subitem2</a></li>
</ul>
</li>
<li class="">
<a href="#" class="">Itemmenu</a>
</li>
</ul>
</div>
</body>
</html>