function display_children($id, $parent) {
      $result = mysql_query("select id,parent,name from m_menu WHERE parent=".$id." and published=1 and menutype='leftmenu' order by ordering  ");
   
   while ($row = mysql_fetch_array($result)){
       
       echo str_repeat('>',$parent).$row['name']."<br>\n";
       
       display_children($row['id'], $parent+2);
   }
}
display_children(0,0);