view :
<label>Cek Data Industri</label>
                    <table class="table table-bordered table-hover" id="tableFormPersetujuan">
                      <thead>
                      <tr>
                        <th>Nama Industri</th>
                        <th>Alamat Industri</th>
                        <th>Telephon</th>
                        <th>Direktur</th>
                        <th>Nomor Surat</th>
                        <th>Periode</th>
                      </tr>
                      </thead>
                    </table>
			</div>




    </div>

      <!-- /.row -->
    </section>
    <!-- /.content -->
  </div>
 <script>
  $(function () {

  	$('#tableFormIndustri').DataTable({
        'ajax': {
        	'url' : '<?php echo base_url()?>index.php/admin/showDataIndustri2',
        	'type' : 'POST'
        }
   	});
    $('#tableFormPersetujuan').DataTable({
        'ajax': {
          'url' : '<?php echo base_url()?>index.php/admin/showFormIndustri'
        }
    });

controller :
public function showFormIndustri()
    {
        $result = $this->auth_model->model_formindustri();
        $dataformindustri = [];
        $dataformindustri['dataform'] = [];

        foreach($result as $index => $value) {
            $dataformindustri['dataform'][$index] = array (
                $value->m_industri['nama_industri'],
                $value->m_industri['alamat_industri'],
                $value->m_industri['telepon_industri'],
                $value->m_industri['direktur'],
                $value->formulirpersetujuan['nomor_surat'],
                $value->formulirpersetujuan['periode']


            );
        };

        echo json_encode($dataformindustri);
    }

model :
public function model_formindustri()
    {
        $this->db->select('*');
        $this->db->from('formulir_persetujuan');
		$this->db->join('m_industri', 'm_industri.kode_industri = formulir_persetujuan.kode_industri');
		$query = $this->db->get();
        $result = $query->result_array();
    	return $result;
    }