labels for SD_Register_Post_Type

if ( ! $this->args['labels'] ) {
	$default_labels = array (
		'name' => _x(ucwords($post_type)),
		'singular_name' => _x($post_type),
		'add_new' => _x('Add New'),
		'add_new_item' => sprintf(__('Add New %s'), $post_type),
		'edit_item' => sprintf(__('Edit %s'), $post_type),
		'new_item' => sprintf(__('New %s'), $post_type),
		'view_item' => sprintf(__('View %s'), $post_type),
		'search_items' => sprintf(__('Search New %s'), ucwords($post_type)),
		'not_found' =>  sprintf(__('No %s found'), ucwords($post_type)),
		'not_found_in_trash' => sprintf(__('No %s found in trash'), ucwords($post_type)), 
		'parent_item_colon' => ''
	);
	$this->args['labels'] = $default_labels;
}