How do I link to files I have created on the file system

[eluser]Unknown[/eluser]
Hi all

I've very new to the codeigniter system and I've got to edit a site that's currently running.

Anyway, I'm generating a file, which I'm storing in the either of the cache directories (system/cache or system/application/cache). I then want to link this new file that I've generated. Unfortunately, we're using url rewriting, so I was wondering if there was a function where I could pass it a directory, and it would rewrite it to a directory that I could then link to the web?

Thanks

Syn