Tags without closing

[Wertos]

How to define for example the tag [hr] to replace with

---

? Without closing tag.

[AragonDeLosReyes]

Have you been able to do it?
At the moment I have not found the correct way, but what I have done is str_replace ('[hr]', '[hr] [/ hr]', $bbcode)

[aught13]

Should change this to an enhancement request to allow for self-closing tags