creating a dynamic menu using php and mysql

this is what I need to genarate

<ul id="0">
 <li >1</li>
   <ul id="1">
      <li > 11</li>
      <li > 12</li>
   </ul&g开发者_高级运维t;
 <li > 2</li>
   <ul id="2">
      <li > 21</li>
      <li > 22</li>
   </ul>
 <li > 3</li>
<ul>

this is my "menu_item" table

id            int(11)
title         varchar(75)
link          varchar(100)
parent_id     int(11)
position      int(11)

//parent_id of 1st layer(menu categories) is 0

I got the table rowset order by parent_id and position by

SELECT 'id','title','link','parent' FROM 'menu_item'
ORDER BY 'parent_id' AND 'position';

I don't know how to generate the html code for the menu using this data. thank you

ref 1
ref 2