How to Get Emulators on an iDevice
1) Open Cydia.
2) Go to Search on Cydia.
3) Type 4iphone.
4) Pick an emulator (the emulators will be from ZodTTD & MacCiti (Games).
5) Hit Install on Cydia.
6) Hit Confirm on Cydia.
7) Wait for the emulator to install.
8) Wait for Cydia to reload its data.
9) Hit Return To Cydia.
10) Hit the home button.
11) The emulator should be on your SpringBoard, have fun! :)