template engine?

3. A sophisticated template engine adds more value to programming than just arrangement relationships between programmers and designers. Seek for block-support, blocks could be defined in an abstract way and placed and moved wherever you like in your master template, a concrete controller can fill them with the concrete information.

This is my biggest gripe with CodeIgniter. A proper hot-swappable templating engine is the main feature I feel CI is lacking and could greatly benefit from.