BlackBerry Empire just posted a about an Instagram port that is working on BlackBerry 10. Here is the link . I have loaded it on mine and it is working fine. I am guessing this is an older version, maybe the same one that the guys at CrackBerry have had for a while.
Let us know!
Please note you will need to sideload this, as it is not native.
Users are experiencing issues with the link above so I will post updated links below: