This is how I do it...
-So firstly you create a contact for each of the shortcuts you would like
-Under the URL of the contact you pur the approporaite URL found here
About ? prefs:root=General&path=About
Accessibility ? prefs:root=General&path=ACCESSIBILITY
Airplane Mode On ? prefs:root=AIRPLANE_MODE
Auto-Lock ? prefs:root=General&path=AUTOLOCK
Brightness ? prefs:root=Brightness
Bluetooth ? prefs:root=General&path=Bluetooth
Date & Time ? prefs:root=General&path=DATE_AND_TIME
FaceTime ? prefs:root=FACETIME
General ? prefs:root=General
Keyboard ? prefs:root=General&path=Keyboard
iCloud ? prefs:root=CASTLE
iCloud Storage & Backup ? prefs:root=CASTLE&path=STORAGE_AND_BACKUP
International ? prefs:root=General&path=INTERNATIONAL
Location Services ? prefs:root=LOCATION_SERVICES
Music ? prefs:root=MUSIC
Music Equalizer ? prefs:root=MUSIC&path=EQ
Music Volume Limit ? prefs:root=MUSIC&path=VolumeLimit
Network ? prefs:root=General&path=Network
Nike + iPod ? prefs:root=NIKE_PLUS_IPOD
Notes ? prefs:root=NOTES
Notification ? prefs:root=NOTIFICATIONS_ID
Phone ? prefs:root=Phone
Photos ? prefs:root=Photos
Profile ? prefs:root=General&path=ManagedConfigurationList
Reset ? prefs:root=General&path=Reset
Safari ? prefs:root=Safari
Siri ? prefs:root=General&path=Assistant
Sounds ? prefs:root=Sounds
Software Update ? prefs:root=General&path=SOFTWARE_UPDATE_LINK
Store ? prefs:root=STORE
Twitter ? prefs:root=TWITTER
Usage ? prefs:root=General&path=USAGE
VPN ? prefs:root=General&path=Network/VPN
Wallpaper ? prefs:root=Wallpaper
Wi-Fi ? prefs:root=WIFI
-Start with "prefs"
Ex for a short cut for wifi the URL would be "prefs:root=WIFI"
-Then under the icon project you click contacts, click the contact that you would like to have the shortcut for, then it will take you to another screen, click the URL.
-Then go ahead and customize the contact img the way you want and click create.
-THen click add to home screen.
-And voila...its done