The "Insert Hyperlink" button is only coded as:
[ url][/url ]
Again, I had to add spaces to show the code.
So if you use the "Insert Hyperlink", then add "=http://www.yourlink" after the first "url" but before the second bracket, then add the "placeholder text" between the second and third brackets, so it looks something like:
[ url=http://www.yourlink]Placeholder Text[/url ] (again with spaces added to show code)
Looks like this with spaces removed:
Placeholder TextIt has to do with the code that is associated with the "Insert Hyperlink" button itself. The "Insert Hyperlink" button would have to generate the different code in order to work as demonstrated. The way it works now is no different than just posting a url into your reply.