76295 Modifications/hack for my site

I have a website at [login to view URL] using a php classifieds software. At the moment the title of the pages always stay the same (never change) even if you browse through the categories and sub categories of the classifieds. What i want is a very slight modification so everytime my users browse through the categories and sub categories, title of the page replaced with the category name of the ad users looking. I hope thats clear enough. Many thanks.