[font="Arial"]Help System is an open source Yii framework extension which provides a custom help tool that can be very easily integrated with your web applications. You can place the widget any where in the view with just a few lines of code. The help text can be categorized into "Sections" and "Topics". You can add N-number of "Topics" under each "Section" and each "Topic" in turn can have N-number of child topics.
See more details/configuration in : http://www.digitalmesh.com/helpsystem/
You can see the demo in : http://app.digitalmesh.co.in/helpsystem/[/font]