I like to show example Code in Text

Dear Enfold-Team,

I like to show some example code like CSS, html, php and so on in my text with a grey background.
It works sometimes with a CSS-Code in a textfiled, but when I try an other code it is not working and a part of the code is deletet.

For example: I tried this code:

<IfModule mod_rewrite.c>
php_value memory_limit 128M
</IfModule>

But only

php_value memory_limit 128M

is visible in the text.

It would be nice, if it looks something like this in the link below. (CSS in a textfield)

Which element (+settings) I can use for this?

Thanks for your help!
Maja