how to make a word press category system?

[xen]

hello i have this tables

CREATE TABLE IF NOT EXISTS `categories` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(50) NOT NULL,
  `parent` int(10) unsigned NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;


INSERT INTO `categories` (`id`, `name`, `parent`) VALUES
(NULL, 'saman', 0),
(NULL, 'suzan', 0),
(NULL, 'saeed', 2),
(NULL, 'sadegh', 3);

and i want to show somthing like suzan>saeed>sadegh
with php and mysql

its just like wordpress category system but i dont know how to make that