public static function types_by_category($order = array( "Text Content", "Text Content (Specialized)", "Structured Content", "Media", "Related Object", "Related Object Type", "Value-Based Content", "Value-Based Content (Specialized)", "Other")) {
$keys = MPFT::type_keys();
$tbc = array();
foreach ($keys as $key) {
MPFT::incl($key);
$type_class = MPU::type_class($key);
if (class_exists($type_class)) {
$category = call_user_func( array($type_class, "__category") );
$tbc[$category][] = $key;
}
}
$types_by_category = array();
foreach ($order as $key) {
if (isset($tbc[$key])) {
$types_by_category[$key] = $tbc[$key];
}
}
return $types_by_category;
}