My view not separate data by use pagination - codeigniter

Question

I use pagination for separate data in the view page it's show the links for select page but it's show all data in database (250 data) it's not separate 30 per page. Please Help me
This my model
function get_item_code($param){
$result = array();
$sql = "select ic.id, ic.item_code, ic.description, maxdt.maxdt, lc.balance,lc.dt ";
$sql .= "from tbl_item_code ic ";
$sql .= "left join ( tbl_lines_code lc inner join ( select id, max(dt) maxdt from tbl_lines_code where active = 1 group by id ) maxdt ";
$sql .= "on lc.id = maxdt.id and lc.dt = maxdt.maxdt ) on ic.id = lc.id ";
$sql .= "where ic.active = 1 group by ic.id ";
// echo $sql;
if ($param->limit > 0)
$this->db->limit($param->per_page, $param->limit);
else
$this->db->limit($param->per_page);
$query = $this->db->query($sql);
if ($query->num_rows() > 0) {
$result = $query->result();
}
return $result;
}
This my controller
public function main(){
$this->load->library('pagination');
$page = $this->uri->segment(3);
$param = new stdClass();
if (!isset($page) || $page == '') {
$page = 1;
}
$param->per_page = 30;
$param->limit = ($page - 1) * $param->per_page;
$paginate_url = site_url('warehouse/main');
$data['total_result'] = $this->m_stock->count_stock ();
$config['uri_segment'] = 3;
$config['num_links'] = 4;
$config['base_url'] = $paginate_url;
$config['total_rows'] = $data['total_result'];
$config['per_page'] = $param->per_page;
$config['use_page_numbers'] = TRUE;
$config['page_query_string'] = FALSE;
$this->pagination->initialize($config);
$data['pagination'] = $this->pagination->create_links();
$data['item'] = $this->m_stock->get_item_code($param);
$this->load->view('v_all_stocks', $data);
}
and this my view foe echo $pagination
<?php
if(isset($pagination) && $pagination != ''){
?>
<div class="search_pagination"><?php echo $pagination; ?></div>
<?php } ?>
and use foreach for show data

Answer 1

In controller
function main()
{
$this->load->library('pagination');
$count = $this->m_stock->count_stock();
$config['base_url'] = base_url() . 'warehouse/main/';
$config['total_rows'] = $count;
$config['per_page'] = 30;
$config['uri_segment'] = 3;
$limit = $config['per_page'];
// Bootstrap style
$config['full_tag_open'] = '<ul class="pagination">';
$config['full_tag_close'] = '</ul>';
$config['first_link'] = false;
$config['last_link'] = false;
$config['first_tag_open'] = '<li>';
$config['first_tag_close'] = '</li>';
$config['prev_link'] = '&laquo';
$config['prev_tag_open'] = '<li class="prev">';
$config['prev_tag_close'] = '</li>';
$config['next_link'] = '&raquo';
$config['next_tag_open'] = '<li>';
$config['next_tag_close'] = '</li>';
$config['last_tag_open'] = '<li>';
$config['last_tag_close'] = '</li>';
$config['cur_tag_open'] = '<li class="active"><a href="#">';
$config['cur_tag_close'] = '</a></li>';
$config['num_tag_open'] = '<li>';
$config['num_tag_close'] = '</li>';
$this->pagination->initialize($config);
$page = ($this->uri->segment(3)) ? $this->uri->segment(3) : 0;
$data['links'] = $this->pagination->create_links();
$data['item'] = $this->m_stock->get_item_code($limit,$page);//pass item code here
$this->load->view('v_all_stocks', $data);
}
In model
function get_item_code($limit,$page)
{
$sql = "select ic.id, ic.item_code, ic.description, maxdt.maxdt, lc.balance,lc.dt ";
$sql .= "from tbl_item_code ic ";
$sql .= "left join ( tbl_lines_code lc inner join ( select id, max(dt) maxdt from tbl_lines_code where active = 1 group by id ) maxdt ";
$sql .= "on lc.id = maxdt.id and lc.dt = maxdt.maxdt ) on ic.id = lc.id ";
$sql .= "where ic.active = 1 group by ic.id ";
$sql .= "LIMIT $page, $limit";
$query = $this->db->query($sql);
$result = $query->result_array();
return $result;
}