How to implement code highlighting features ?

[eluser]mi6crazyheart[/eluser]
[quote author="WanWizard" date="1289789871"]I'm using http://qbnz.com/highlighter/ in my forum code...[/quote]

Hey WanWizard, if i've a text like this(mixture of text & codes as we use in CI forum generally)...

Code:

$text = 'Good morning.<code>echo 'PHP is a great language';</code> Today is a great day';

Then, can GeSHi will able to color codes which present inside "colorTag" & leave rest text as usual as CI forum do.