PHP Category Linking

[logisticdesigns]

I want to link to files using category not just .php or .html.

For example.

http://www.logisticdesigns.biz/link.php?id=5

I want to put the main script to process from http://www.logisticdesigns.biz/system/

then I need a file called link.php duh!

Example:

file1.html = id1
file2.html = id2
so instead of http://www.logisticdesigns.biz/index/file1.html
it would be http://www.logisticdesigns.biz/system/link.php?id=1
and it would be redirected back to file1.html without the actual .html web url!!!

Can this be done, please help!

[Tewl]

header('Location: directory/file.html');

[logisticdesigns]

How would I use that in a form of a link?