XF 2.0 Custom BBCode - Replace space with underscore in {text}/{option}

[kbryant414]

I'm probably overlooking something simple again. This is just a dummy-proofing step I'm trying to do.

For example, say that I'm making a bbcode that the user enters a color for.

[bbcode=Red]Some content.[/bbcode]
<font color="red">Some content.</font>​

If the user puts in a color with spaces, I want the {option} to treat spaces as underscores.

[bbcode=Brick Red]Some content.[/bbcode]
<font color="brick_red">Some content.</font>​

Thanks for any help.