Adding a class to every user link

Hi there,

I want to add a class to every link on the website that is created by the user’s back-end bio information.

I’m not sure if that makes sense. So here is another way to explain it:

For every user, you can define a website URL. Then you can call that website URL where ever on the website. I want to add a class to that link.

I suspect that I need to manually do that where ever I choose to call the URL, right? I’m asking on this forum because I’m hoping there is some sort of global WordPress file I can edit.

Thanks!