Pages 5 for iOS 7 not syncing
I suggest doing the following:

Remember to backup every file through email if not already synced with iCloud.


Disable and then enable iCloud sync for Pages in the Settings app under Pages section, it's located in Preferences - Pages, the switch is labelled Use iCloud. Quit the app through launcher before disabling, launch the app after disabling, and then quit it before enabling again.
Disable and then enable document syncing for Pages app under Preferences - iCloud - Documents and Data, the switch is labelled Pages. Do the same thing in italic as in (1).
Delete the app and then install it again.
Disable and then enable system-wide Documents &amp; Data syncing under Preferences - iCloud. Do the same thing in italic as in (a).
Delete iCloud account from iPhone and then add it again. It can be done under Preferences - iCloud.