I have a very similar issue, however, my parent menu uses icons, so using the OP as an example,
If Banquette is highlighted it would be:
.sidebar .menu .banquette a { background: url(images/banquette.png) no-repeat; }
.sidebar .menu .banquette a:hover,
.sidebar .menu .banquette a:focus,
.sidebar .menu .banquette a.active { background: url(images/banquette_selected.png) no-repeat; }
How would I set the sub navigation (designer, traditional) to capture that behavior?
Is there a conflict with the plugin or something I am not aware of? Sorry, I’m new at this!
I cannot say for certain, but since no javascript functions, I can only guess that the jquery has been disabled, but I’m afraid I do not know where they are stored in WP.