Is there a way to copy a dynamic website and change the file names from
<http://williamssound.simultaneousequipment.com/productdetailf884.html?product_id=112>
to
<http://williamssound.simultaneousequipment.com/productdetailf884.html>

I have downloaded a website but its all dynamic and I been try ing to find an
easy way to converted to plain HTML without going page by page.. 
Thanks