----------------------------------------------------------------------------
CONTROLLER
----------------------------------------------------------------------------
public function tambah_proses()
{
    $this->load->library(\'upload\');
    $dataInfo = array();
    $files = $_FILES;
    $cpt = count($_FILES[\'userfile\'][\'name\']);
    for($i=0; $i<$cpt; $i++)
    {
        $_FILES[\'userfile\'][\'name\']= $files[\'userfile\'][\'name\'][$i];
        $_FILES[\'userfile\'][\'type\']= $files[\'userfile\'][\'type\'][$i];
        $_FILES[\'userfile\'][\'tmp_name\']= $files[\'userfile\'][\'tmp_name\'][$i];
        $_FILES[\'userfile\'][\'error\']= $files[\'userfile\'][\'error\'][$i];
        $_FILES[\'userfile\'][\'size\']= $files[\'userfile\'][\'size\'][$i];

        $this->upload->initialize($this->set_upload_options());
        $this->upload->do_upload();
        $dataInfo[] = $this->upload->data();
    }

    $data = array(
        \'judul_produk\' => $this->input->post(\'judul_produk\'),
        \'userfile\' => $dataInfo[0][\'file_name\'],
        \'userfile2\' => $dataInfo[1][\'file_name\'],
        \'userfile3\' => $dataInfo[2][\'file_name\'],
     );

     $this->Produk_model->insert($data);
}

private function set_upload_options()
{
    $config = array();
    $config[\'upload_path\'] = \'images/\';
    $config[\'allowed_types\']    = \'jpg|jpeg|png|gif\';
    $config[\'max_size\']         = \'2048\'; // 2 MB

    return $config;
}

----------------------------------------------------------------------------
MODEL
----------------------------------------------------------------------------
function insert($data)
{
  $this->db->insert(\'namatabel\', $data);
}

----------------------------------------------------------------------------
VIEW
----------------------------------------------------------------------------
<?php echo form_open_multipart(site_url(\'tambah_proses\'));?>
<div class="form-group"><label>Gambar</label>
  <input type="file" name="userfile[]" multiple>
</div>
<?php echo form_close() ?>