Good new for themers: Saurik, the creator of Cydia, updated WinterBoard to v0.9.3912 with support for iOS 7 devices, and support for 64bit devices( iPhone 5s, iPad Air and iPad Mini with Retina display ). Saurik says that the new WinterBoard “seems” compatible with 64bit devices, which means that there might be bugs left and theme creators are encouraged to get involved and report any crashes and bugs.
WinterBoard allows you to give your iOS device a graphical overhaul! It provides hooks that let graphics artists safely and simply theme almost anything in iOS, including third party software downloaded from App Store. Multiple theme packages can be installed at once using the configuration interface: simply drag themes into a priority order.
WinterBoard is available for free in Cydia via Cydia/Telesphoreo repo ( default repo ).