Function: Make URLs clickable in content areas

Function: Catches links so rel=nofollow can be added (on output, not save)

Function: Callback to decode the tags in topic or reply content

Function: Callback to replace empty HTML tags in a content string

Function: Callback to replace normal HTML tags in a content string

Function: Filter the topic or reply content and output code and pre tags

Function: When editing a topic or reply, reverse the code trick so the textarea contains the correct editable content.

Function: Filter the content and encode any bad HTML tags

Function: Callback to encode the tags in topic or reply content

Function: Custom allowed tags for forum topics and replies