I have used same YUi 3.2 horizontal menu by following: http://yuiblog.com/sandbox/yui/3.2.0pr1/examples/node-menunav/node-menunav-3.html
Adding the code after the nav structure (Div containing <ul><li>) worked for me:
<script type="text/javascript">
YUI().use("node-menunav", function(Y) {
var menu = Y.one("#navigation");
menu.plug(Y.Plugin.NodeMenuNav, {lazyload: true, submenuHideDelay:500, mouseOutHideDelay:1000 });
/*Show the menu now that it is ready*/
menu.get("ownerDocument").get("documentElement").removeClass("menu-loading");
});
</script>
Be kell jelentkezni ahhoz, hogy ez helytelenként legyen megjelölve.