If you used an earlier version of Pangu that didn’t include Cydia as part of jailbreak process, you don’t need to re-jailbreak it. To install Cydia, simply run the Pangu app from your home screen.
- Tap on ‘Install Cydia’.
- Now tap on ‘Install’ found in top right corner of the screen to begin installing Cydia.
- After reboot/respring, you will have latest Cydia on your iOS device.
You might like to watch Detailed process to Jailbreak iOS 8 – 8.0.2