Mega Menu question

Hi All,

I want to add a mega menu to my site for all my categories.

I’ve installed JQuery Mega Menu from wordpress.. But it looks for a custom menu before it will work.

I went into the menu page and I can’t select the “Categories” where all my categories are posted. I can select wordpresses default “categories” but Premier press has it’s categories inside the listing manager which you can’t select.

Do I have any options ? I’ve about 50 categories I’d like to display in a mega menu.