Added custom BBCodes:

• collapse tag
  
  this content
  
  
  CODE
  [collapse]this content[/collapse]
• toggler tag
  
  when this content is clicked...
  show this content
  
  
  CODE
  [toggler="show this content"]when this content is clicked...[/toggler]
• retoggler tag
  
  content 1, but when clicked upon it changes to...

  content 2, and when that is clicked it changes back to...
  
  
  CODE
  [retoggler="content 2, and when that is clicked it changes back to..."]content 1, but when clicked upon it changes to...[/retoggler]

to replace the current spoiler tag;
This was the old spoiler tag...

Note that the toggler and retoggler are a bit buggy when you edit your post