Remove Link from Menu/Navbar

Hi,
Is there any way I can remove a link from the menu/navbar at the top of the page.
Take a look at http://www.henco-julfo.co.uk/, there is an ad in the sidebar titled “Link Exchange Advertisement”. Just above the ad, there is a link saying “↓ More Info on this ad”, i would like this to link to a page which explains about that ad and gives visitors the oppurtunity to report an innappropriate ad. This is currently set up, but the page that it links to is linked to in the menu/navbar, which i don’t want. I have tried making the page private, but that also makes it unavailable if you are not logged in.
The theme i am using is widgetlike.
Any help would be much appreciated =)