Let me start again, I misread your post the first time. Go to AdminCP> Ads> Choose the ad that is located below the navbar & edit it to display if user is browsing style (whatever your new style is)...
Or you can create a new ad> Admincp>Advertising>add new ad> Global> click on the navbar area> Below navbar> enter code, display this ad if: choose the style you like, click the active box, save