in both iOS 7 betas, i have discovered a glitch that allows you to put folders in folders and it is completely functional
1. press and hold the folder that you want to go inside another folder AND double-click the home button (bringing up multitasking)
2. go back to home screen by pressing the screenshot in multitasking
3. press the folder that you want to put the other folder in
4. press the grey folder and drag it into place
1. press and hold the folder that you want to go inside another folder AND double-click the home button (bringing up multitasking)
2. go back to home screen by pressing the screenshot in multitasking
3. press the folder that you want to put the other folder in
4. press the grey folder and drag it into place