[TYPO3] Tricky H2 rewrite

[Tyler Kraft]

Hi

Ok this one is a bit beyond me I think, as I'm stumped. I have a css 
layout and it has <h2>...</h2> placed via the RTE as one might expect. 
But it also may have <h2 class="spc">...<h2>

Using lib.parseFunc_RTE how can I remap the <h2 class="spc">...</h2> to 
become <h2 class="spc"><span>...</span><h2> on the way out?

Any help appreciated.

Ty