How to add prefix to all links

[GoNZo_]

Hello, i need to add this: to all external links
onclick="return openEx('http://link.com');"
Help plz

[JMH11788]

All links that are posted by users?

[GoNZo_]

well all external links in user signature in post...

[Attilitus]

This hack will open all URLs in a frame located on your site:
https://vborg.vbsupport.ru/showthread.php?t=136333

Perhaps that would achieve what you want?