no, there is currently no way to do so on stock ios. it is restricted by the framework itself, and thus not possible as it is.
on a jailbroken iphone this is possible, but it will perhaps only work on the same jailbreak of the very same version.
edit:
one other solution, which won't pass to appstore, is to find some exploitable bug in the ios (there must be a lot, check out how jailbreaks are done) to gain root access in your app. then you would be able to access the data you want on a non-jailbroken iphone. but it will probably only work on the version on which you developed it.
no, there is currently no way to do so on stock ios. it is restricted by the framework itself, and thus not possible as it is.
on a jailbroken iphone this is possible, but it will perhaps only work on the same jailbreak of the very same version.
edit: one other solution, which won't pass to appstore, is to find some exploitable bug in the ios (there must be a lot, check out how jailbreaks are done) to gain root access in your app. then you would be able to access the data you want on a non-jailbroken iphone. but it will probably only work on the version on which you developed it.