I believe what you are looking for is Code2HTML. I answer because you ask. But be forewarned: if you use this, you will get a quick -- vote from myself and other monks. Despite the -- votes, I will often still try to respond to the post.

Intrepid has been known to use this and I routinely vote him down when he uses it (and when he places banner ads in his posts!!!).

It's not that I object horribly to "prettifying" your code, but it's a bit of a distraction and sometimes makes the code illegible with some of the Perlmonks themes.

Cheers,
Ovid