Regex not working properly for url's

[coreation]

Problem:

When running a process for the regex "^(www.)", a triple gets made like this:

<https://datahubtest.westtoer.be/http://www.kasteelvanloppem.be / www.zedelgem.be>

This is the case for westtoer's bezienswaardigheden if you want to reproduce the problem. This needs be fixed asap, or you telling me that I'm doing something wrong.