Question

I have the following table :

id      name                       lft     rgt     level
---     -------------------------  ----    ----    -----
1       company name                1       16      0
2       HR                          2       3       1
3       Superwiser                  4       9       1
4       Associates                  5       6       2
5       test                        10      13      1
6       test2                       11      12      2

Using this database I want to display the tree structure in ul li tag. But not getting this table. I want to display like this:

1. Company Name
|--:Hr  
|--:Superwiser  
   |--:Associates  
|--:test  
   |--:test2

How can I fire specific query for this and how to display it in ul li tag. Thanks in advance.

Answer 1

<?php

class Category
{

var $table='';
    var $CI ='';
    var $ul_class='';

    function Category($config=array()){
        $this->table=$config['table'];
        $this->CI=& get_instance();
        $this->CI->load->database();
        $this->ul_class=$config['ul_class'];
    }
    function getTree($parent_id=0){

       $this->CI->db->where('parent_id',$parent_id);
       $first_level=$this->CI->db->get('category')->result();
       $tree= '<ul class="'.$this->ul_class.'">';
       foreach($first_level as $fl){
           $tree.='<li>'.$fl->name;
            $this->CI->db->where('parent_id',$fl->cat_id);

           $count=$this->CI->db->count_all_results($this->table);

           if($count!=0){
               $tree.=$this->getTree($fl->cat_id);
           }
           $tree.= '</li>';
       }
       $tree.= '</ul>';

       return $tree;
    }

}
?>

Use this library