I have seen on other xenforo forums the admins added them as approved media or put a addon in that allowed bbcode to insert it. I am not really in the know on how or what it is that did it
http://i.imgur.com/MA9tr9p.jpg[DOUBLEPOST=1415584503,1415584496][/DOUBLEPOST]Hmm.[DOUBLEPOST=1415584947][/DOUBLEPOST][DOUBLEPOST=1415584964][/DOUBLEPOST]Albums work but not individual pictures.
http://i.imgur.com/MA9tr9p.jpg[DOUBLEPOST=1415584503,1415584496][/DOUBLEPOST]Hmm.[DOUBLEPOST=1415584947][/DOUBLEPOST][DOUBLEPOST=1415584964][/DOUBLEPOST]Albums work but not individual pictures.