In iOS7 safari, clicking smart banner "open" button doesn't trigger UIApplication::openURL:(NSURL *)....
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
This issue reproduced only in iOS7. I have a feeling that this is a bug in iOS7.
Well-known bug in iOS 7.
http://openradar.appspot.com/15229369
http://openradar.appspot.com/14712951
https://devforums.apple.com/message/897373#897373
Get all your developer buddies to keep filing duplicate Radars until Apple deigns to address the issue is your only option here.