Simple template engine needed for php website

This project consists of upgrading a php based website to a simple template system such as VarPage, XTemplate, bTemplate, PHPTAL, etc. The website was designed by a coder and is working properly but I want to separate the php code and html for easy template updates latter. I can also assist in the project and help make the changes to the pages as needed to save time. This project needs to be completed in a timely manner. Thank You