On his blog, Nick Lo has posted a brief tutorial showing how to use custom view helpers with the Zend Framework.

Currently the framework (version 0.1.3) includes a small selection of form helpers which will no doubt expand as it matures. For now I'm more interested in the ability to add custom helpers for specific project use.

He shows both the code and the directory structure to implement these custom view helpers, including a cuationary note about how the View helper should be named to get things to play nice together.