PhoneGap-based iOS app rejected by Apple for "using a non-public API",

We just created an iOS application based on PhoneGap 0.9.5.1 and received it from Apple with this answer:

Applications using non-public APIs will be rejected

The following non-public APIs have been found in your application:

_gsEvent
setNavigationBar:

The application has several UIWebView (s) and a navigation bar for moving between them. We simply wrote HTML / CSS / Javascript for each UIWebView and implemented a basic navigation bar. Everything else is handled by PhoneGap.

Can anyone help with this? thank!