Sorry for the late reply, just seen this.
As far as i'm aware
It's not possible to do this in an embedded forum that you don't personally own as essentially what you are trying to do is convert
<a href="http://www.google.com" target="_blank">www.google.com</a>
to
<a href="http://www.google.com" target="_self">www.google.com</a>
Which, I'm afraid, is not as simple as just changing <a href="http://www.google.com" target="_self"> into square bracket code as the two do not transfer seamlessly.
It is often forum defaults or even browser defaults that determine this state (unless manually tampered with)
A big however is that if you have access to the html, then this is a very simple procedure that I could definitely help you with.
My recommendation is to confirm this with someone who has a greater knowledge on this than myself before giving in.
Didn't see that this has been answered in a different subforum
Last edited by Bless; Sep 2, 2017 at 02:30 AM.