Although BlackBerry 10 OS comes with the ability to install Android's APK files, many people still prefer to have native clients for their favorite apps. iGrann can be your option should you choose to have native client for Instagram on your BlackBerry 10 device. It comes with a free version and a paid version (called iGrann Pro) which gives a lot more features like Hub integration.
With iGrann Pro users have experienced issues regarding the Hub integration, the developer has rolled out an upgrade to fix it and some other minor issues as well. For those of you who already bought the iGrann Pro, the update is free and for new customers, you can buy the app for $1.99. You can update / purchase iGrann Pro here.