Outlining in PHP

An approach to outlining...

I've developed a PHP-based method to produce (web) pages where content can be hidden and expanded as needed. It does not use JavaScript, however a JavaScript-enhanced version could be developed. Since it is a server-side technique, the page has to be re-loaded whenever a change is made to what is displayed; using JS all the content would be loaded once, and control of the styles would be managed by user-agent code. I feel that is is preferable for accessability and usability reasons, when developing a technique like this, to not rely on JS, then to add the JS later.

A sample: