I've read your question several times and still do not understand what you want to achieve. Perhaps you should show us the code that you are having trouble with and a small sample of the data. Show us the output you get and what you expected. Something of this nature should only require half a dozen lines of code and less than fifty characters of data to show the problem.

As the good Zaxo implies, XML and regex in one question is a triger here and we generally strongly suggest you use one of the many modules that know how to handle XML. A favourite is XML::Twig.