Forunately, it's just a standard UL, styled to look as it currently does. You''d need to go in a rewirite the CSS rules for ul.cat-list, which shouldn't be hard. It would start with removing styles like
Code:
ul li.cat-item {
float: none !important;
}
You could also get rid of the <a> for the categories link before the menu:
Code:
<a href="#" class="pfilter">Categories <span> </span></a>
I think it's all controlled by JS anyway, I believe.
Perhaps create a test page and messa round with this a bit. It's hard to do remotely, without access to the files.
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