paging

<-----------------controller------------------>
 function cari(){
        $cat = $this->input->post('pilih');


    if ($cat == 1) {
            $tgl_awal = $this->input->post('tanggal');
           $tgl_akhir = $this->input->post('tanggal_2');

            $data['View_training'] = $this->VT->cari_plan_tgl($tgl_awal,$tgl_akhir);
            $data['isi']='Data_view';
            $this->load->view('template', $data);
        }
        elseif ($cat == 2){
        $page=$this->uri->segment(3);
    if(!$page):
    $offset = 0;
    else:
    $offset = $page;
    endif;
    $data['View_training']="";
    $judul = $this->input->post('materi');

           if(!empty($judul))
        {

        $data['View_training'] = $this->input->post('materi');
                $this->session->set_userdata('materi',$judul);

        }
        else
        {
        $data['View_training'] = $this->session->userdata('materi');
        }
    $data['View_training'] = $this->VT->cari_plan_judul($judul,5,$offset);
    $tot_hal = $this->VT->tot_hal($judul);

    $config['base_url'] = base_url() . 'index.php/cuser/cari/';
        $config['total_rows'] = $tot_hal->num_rows();
        $config['per_page'] =5;
      $config['uri_segment'] = 3;
         $this->pagination->initialize($config);
         $data['isi']='Data_view';
         $this->load->view('template', $data);
            }

        else {
            redirect ("cuser/view" , "refresh");
        }

    }
<---------------------------------------------------->
<-------------model------------------->
 function cari_plan_tgl($tgl_awal,$tgl_akhir){

        return $this->db->query("select * from view_plan where TGL_MULAI between '$tgl_awal' and '$tgl_akhir'  ");

        }

    function cari_plan_judul ($judul,$batas,$offset) {

            $q = $this->db->query("select * from view_plan where NAMA_M_TRAINING like '%$judul%' LIMIT $offset,$batas");
            return $q;
    }
                function tot_hal($kata)
    {
        $q = $this->db->query("select * from view_plan where NAMA_M_TRAINING like '%$kata%'");
        return $q;
    }
<--------------------------------------->