I
think the reason why you're having trouble when you just enter text (and not links) into the menu is because of all the javascript code associated with the menu.
Here is what I would do.
Above the code for the menu, just enter the name of the category as text. Do not enter that text within the code of the menu.
If you're familiar with CSS, you can create like an H2 tag with all the different characteristics (font size, color, background, decoration, etc) that you would want.
And so in your main page, you can just enter "<h2>" followed by the name of the category, then close the h2 tag.
Then, the menu code.
Repeat the h2 tag and menu code for as many categories as you want.
Ok, I hope this makes some sort of sense
Sherif