some regex

ok I've on a results of a form submission page I've made, I've pulled all the $key and $val pairs into a table what I would like to accomplish is to format the keys/values for better appearance for instance some keys would be email_required salesPerson_required etc... I need to capitalize the first letter of each word plus create a space for the "_required" character I think that might look like this $key = ereg_replace("_required", " ", "$key"); and I also need to put a space when a key is actually two words denoted by a inset capital letter any help or ideas would be great Jerry Lake