replacing nested html

[Adrian Schneider]

forward conversions:

This Becomes => This
{IFMEMBER} => <if condition="(ifmembercondition)">
{/IFMEMBER} => </if>

{IFCONDITION} => <if condition="(somecondition)">
{/IFCONDITION} => </if>

how would I do this backwards without messing up the order everything comes in? (clearly I can't do a standard str_replace)

(actual usage) I'm grabbing a template from the style manager, and i want to convert it to the form that the users use for customizing their page.



i **COULD** add <!-- ifmember --> directly after each </if> as I make them, but that is pretty ridiculous.