Add class to all labels in a comment form Pretty straight forward.  For every label within a comment form, I wish to add a particular class to it.  Using only functions in template.php, in Drupal 7, how can this be done?  If it can't be done this way, what is the most straight-forward alternative?
Can't come up with a cleaner solution than implementing theme_form_element_label and adding the classes there depending on the elements name (comment_body) etc.

Maybe an option is to implement hook_form_comment_form_alter() and add specific identifiers to the elements you want to change the css class for the labels on in theme_form_element_label().