Changing URL display format

[fulltilt]

On my site, the link_summary.tpl file uses $url_short to display the URL entered by the users when submitting a story.

It displays in this format :

http://www.fulltiltprod.com

What are the changes I need to make to get it to display just :

fulltiltprod.com


I'm very new to Pligg so the answer could be obvious, but it's getting late here and I've tried some PHP code and it didn't work.


Hope you can help ....

Cheers