Automatically display titles on category, tag and taxonomy archives

functions.php

<?php

/**
 * Default Category Title in Genesis
 *
 * @author Marusca Gabriel
 */
function mg_default_category_title( $headline, $term ) {
	if( ( is_category() || is_tag() || is_tax() ) && empty( $headline ) )
		$headline = $term->name;
		
	return $headline;
}
add_filter( 'genesis_term_meta_headline', 'mg_default_category_title', 10, 2 );