WPVN-HideText

This plugin is used to hide some content in a Post or a Page by a link, when you click the entire hidden content will appear.

The link is not toggle between Show/Hide for this version, I will implement that function soon.

Use: case insensitive

[ hide[=Text to be displayed instead of default text]]TEXT[/hide ]

http://wordpress.org/extend/plugins/wp-hidetext/