i try to avoid regex's at all costs 🙂
try this
$email = "<a href=\"mailto:you@me.com\">"
$colon_position = strpos($email, ":")
$last_quote_position = strrpos($email, "\"")
$new_email = substr($email, $colon_position+1, ($last_quote_position - $colon_position))
that should work i didnt test it though.
if anyone would care to demonstrate with an expression i would be interested.
paul