hdpb

I'm building a website where I will have a table of around 20 or so links at the top. After clicking a link, I want the resulting page to be the same as my index (layout wise) but with PHP bringing the appropriate data from a database into the body. I already know how to do that, but how can I make this process easier than building 20 separate pages? I probably didn't do a very good job of explaining the first part, so here's a diagram of the layout: