Open that up, select Spring Board, and choose the top crash.Crash Reporter will try to provide an automated guess as to what extension caused the crash.
Safe mode is a feature of Cydia Substrate that prevents your device from entering a permanent crash cycle by giving you a chance to uninstall malfunctioning extensions without a complete device restore.
Below are instructions for help on how to get your device back in working order.
If it finds something, try removing that package in Cydia.
(Be careful about uninstalling packages you don't recognize, in case they're packages that Cydia needs.)If you still can't get your device back in working order, your next best bet is to ask for help.
Open up Cydia, go to Installed, tap Recent, find the tweak and tap it, tap Modify in the top-right corner, and tap Remove to uninstall it.
Especially try uninstalling any extensions that may not be compatible with your device's i OS version (often the description page for an extension mentions which i OS versions it is compatible with).