[TYPO3-english] Keep unclosed html tag

[Gregory Loichot]

Hello,

I'm using a TYPO3 4.5.27 and add a content type "html" on a page: <div 
class="youpi">. As you can see my HTML code is not "valid".

TYPO3 is so smart that it correct my HTML code by adding </div>. How can 
I tell TYPO3 not adding closing tags?

Thank you
Greg