While rebooting and respringing the device can lead to a temporary solution, there’s one method that fixes the problem once and for good.
STEPS to follow:
1. Make use of iFile and head over to /var/mobile/Library/BulletinBoard or just SSH into the device.
2. Now take this file SectionInfo.plist and rename it to anything else.
3. Respring your phone.
4. Head back to /var/mobile/Library/BulletinBoard and delete the renamed file from step 2. This is a way to keep a backup, but you can delete directly in step 2 if you know these steps.
5. All of this is going to resent the Notification Center’s Today view. Now go to Settings – Notification Center – toggle on/off every section you want to enable or disable.
These are the only steps required. Let us know if this works as a solution to your problem and feel free to leave comments.