copy all xml nodes and rename few in them using XSLT

[aprox]

I have an XML, in that XML I have an element <storybody> which itself have several elements, now what I want is copy every in <storybody> and change <URI> tag in <storybody> with <a>.Remember I need to do this for only <storybody> in document. XML Structure:\[code\]<mothertag> <atag> asdfasdfa </atag> <storybody> <p>sometext here<URI ref="http://google.com" /> some more text</p> </storybody></mothertag>\[/code\]Now I want to change this URI to a tag.