In November last year I told you that the beta version of iOS 5 will limit the possibility of making shortcuts for iOS settings without jailbreaking and Apple has not changed anything at all regarding this system. iOS 5.1 was released the other day and it prevents users from using url shortcuts to open/activate various iOS settings. Using this system I could activate Wi-Fi/Bluetooth, AirPlane Mode, I could open various menus of the Settings application, but everything can be forgotten now because these things can only be done if we have a jailbreak.
Unfortunately, until now, no workaround has been discovered for this limitation imposed by the Apple company, and I don't think there will be one in the future unless Apple modifies the shortcut system of its iOS.
