I\'ve been searching a really really long time for an XML Parser usable with PhoneGap. Is there a way to use this http://www.edumobile.org/iphone/iphone-programming-tutorial
Rule of thumb about Phonegap: for the most part anything you can do in the browser using Javascript, you can do in Phonegap using Javascript with a couple of nice bonus API calls. See Phonegap API Doc and Phonegap community plugin repository (Note if you absolutely need some additional functionality from iPhone or Android or whatever platform the repo would be the place to go asking about it).
So Javascript XML is what you are looking for.
Or alternatively if you have options for formats, JSON is probably your best bet.