Change behavior off the [_url] shortcode in contact form 7

I get some dynamic data in the URL that I want to send in my mails.

I use the short code [_url] resulting in this when sending the mails: http://ift.tt/1TFzvfV

I want to remove my domain name and only send the dynamic data when using [_url].

Anyone know how to make a function for this?

via Chebli Mohamed