I have an in-house app which I distribute over a local wifi
in release page have a link like this
itms-services://?action=download-manifest&url=h
It seems Apple have disabled all URL schemas in iOS7 (including mailto: links) in standalone webapps. This has seriously implications for my place of work.
See this post: https://discussions.apple.com/thread/5385948?start=0&tstart=0