That's the whole point of tapatalk I'm afraid. Tapatalk is just a standardised way of interpreting the forum database, which is supposed to make browsing across various different forum software's and site standardised viewing, giving them all the same clean stripped back look.
Unfortunately, this means stripping out a lot of useful things like bb code etc, so the only way to insert it is manually.
We have no control over this part on tapatalk either, so it's nothing we can alter.