the_category_head( string $before = '', string $after = '' )

107function the_category_head( $before = '', $after = '' ) {108	global $currentcat, $previouscat;109 110	_deprecated_function( __FUNCTION__, '0.71', 'get_the_category_by_ID()' );111 112	// Grab the first cat in the list.113	$categories = get_the_category();114	$currentcat = $categories[0]->category_id;115	if ( $currentcat != $previouscat ) {116		echo $before;117		echo get_the_category_by_ID($currentcat);118		echo $after;119		$previouscat = $currentcat;120	}121}