Help with non http menu link

Hello i’m trying to make a menu that is a link, which works fine if it is a http or a ftp link.
But the problem is that i want to use a link like this

“ts3server://ts3.hoster.com?port=9987”

which open teamspeak and join my server, however every time i try it wordpress removes the link.

So does any one know how to make wordpress not remove ts3server:// links?

I know there is a few ts3 widgets that works but i would prefer not to use a widget.

Thanks in advance for any help^^