[Agent Wesker]

Here is a slightly improved Regex from testing on our server:
((http:[/]{2}|https:[/]{2}|www[.])?[-a-zA-Z0-9]{2,}[.][a-zA-Z]{2,5})



I also modified your code to loop through each match in case of multiple links.

Edit: Fixes have been merged https://github.com/Totenfluch/SmartLinkRemover