Sorry to disappoint you, but there doesn't seem to be a Cydia hack that has been proven to work on Instagram.
Most people who try to hack Instagram do so because they want to see private photos or profiles, but Cydia is really only an app that you can use to find and download software onto a jailbroken iPhone.
Yes, the type of apps that Cydia gives you access to are often the kind that aren't approved by the app store, but I have yet to see an app which successfully bypasses the security measures in place at Instagram.
In case you didn't know, Instagram is owned by Facebook: One of the largest, most wealthy and security-savvy tech companies in the world.
The chances that a $2 app that is only available to jailbroken devices will bypass those privacy settings is slim to none my friend.
Instead, there seem to be cydia-enabled apps that help you gain followers on Instagram. If that's something you're interested in, then take a look:
