Now you don't need to unlock your device first to see all the notifications appears on your screen, because Bulletin makes it possible to view them all in the lockscreen mode. In case you need a variation, there is an option to juggle your notification center into transparent appearance on homscreen and lockscreen.
Bulletin gives you configuration options in Settings.app from where you are able to both disable or enable this tweak any time you wish. However, to get this tweak installed on your device, you need to firstly buy it for $0.99.
Are you interested? Then launch Cydia to get Bulletin and install it to your device.
Hope you will find this post useful.