simple code to create php menu tree. Inspired by Drupal.

example.php

<?php
require_once('menu.php');
?>
<?php load_menu() ?>
<table cellpadding="0" cellspacing="0" border="0" class="stdtable">
    <colgroup>
        <col class="con1">
        <col class="con1">
    </colgroup>
    <thead>
        <tr>
            <th class="head1">Menu Items</th>
            <th class="head1">State</th>
        </tr>
    </thead>
    <tbody>
      <?php load_menurow() ?>
    </tbody>

    <tfoot>
        <tr>
            <th colspan="2"><button class="stdbtn btn_red" style="float: right;">SAVE</button></th>
        </tr>
    </tfoot>

</table>

menu.php

<?php
/**
* @author ihsanberahim
*
Credit:
http://ihsanberahim.com
http://pkmedia.com.my
http://fiction-labs.com
*/

global $db;

$db = new PDO('mysql:host=localhost;dbname=test_menu', 'root', 'root');
$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);

function load_menu()
{
  global $db;

  $query = $db->prepare("SELECT * FROM menus WHERE type='group' ORDER BY id");
  $query->execute();
  $menus = $query->fetchAll();

  foreach($menus as $menu)
  {
    echo '<ul>'.render_tree($menu).'</ul>';
  }
}
function load_menurow()
{
  global $db;

  $query = $db->prepare("SELECT * FROM menus WHERE type='group' ORDER BY id");
  $query->execute();
  $menus = $query->fetchAll();

  foreach($menus as $menu)
  {
    echo render_tablelist($menu,array(
        'before' => '',
        'after' => ''
      ));
  }
}
function get_children($menu_id)
{
  global $db;

  $query = $db->prepare("SELECT * FROM menus WHERE parent_id=:menu_id");
  $query->execute(array(
      ':menu_id' => $menu_id
    ));
  return $query->fetchAll();
}
function render_tree($menu_item,$option=array())
{
  $menu_item = (array) $menu_item;
  $_option = array(
      'sub_before'=>'<ul>',
      'sub_after'=>'</ul>',
      'before'=>'<li>',
      'after'=>'</li>'
    );
  $option = array_merge($_option,$option);

  extract($option,EXTR_SKIP);

  $menus = get_children($menu_item['id']);

  $output = '';

  if($menus)
  foreach($menus as $menu)
  {
    $output .= render_tree((array)$menu);
  }

  $link_attributes = '';
  $link_class = implode(' ',array(
      'menu-type-'.$menu_item['type'],
      'menu-id-'.$menu_item['id']
    ));
  $link_format = '<a href="%s" class="%s" %s title="%s">%s</a>';
  $link = sprintf($link_format,
    $menu_item['url'],
    $link_class,
    $link_attributes,
    $menu_item['title'],
    $menu_item['title']);

  return $before.$link.$sub_before.$output.$sub_after.$after;
}
function render_tablelist($menu_item,$option=array())
{
  $menu_item = (array) $menu_item;
  $_option = array(
      'sub_before'=>'',
      'sub_after'=>'',
      'before'=>'<td>',
      'after'=>'</td>'
    );
  $option = array_merge($_option,$option);

  extract($option,EXTR_SKIP);

  $menus = get_children($menu_item['id']);
  $has_children = !empty($menus);

  $output = '';

  if($has_children)
  foreach($menus as $menu)
  {
    $output .= render_tablelist((array)$menu);
  }

  $row_attributes = '';
  $row_class = implode(' ',array(
      $menu_item['type'],
      'menu-type-'.$menu_item['type'],
      'menu-id-'.$menu_item['id']
    ));
  $row_format = '<tr><td class="%s">%s</td><td>%s</td></tr>';
  $row = sprintf($row_format,
    $row_class,
    $menu_item['title'],
    $menu_item['status']);

  return $row.($has_children ? $sub_before.$output.$sub_after : '');
}
?>

menus.sql

CREATE TABLE `menus` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `title` text,
  `url` text,
  `status` varchar(255) DEFAULT NULL,
  `parent_id` int(11) DEFAULT NULL,
  `order` int(11) DEFAULT NULL,
  `type` varchar(255) DEFAULT 'item',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=latin1;