$filesCount = count($_FILES['photo_gallery']['name']);
for($i = 0; $i < $filesCount; $i++){
                    $_FILES['gambar_tambah']['name'] = $_FILES['photo_gallery']['name'][$i];
                    $_FILES['gambar_tambah']['type'] = $_FILES['photo_gallery']['type'][$i];
                    $_FILES['gambar_tambah']['tmp_name'] = $_FILES['photo_gallery']['tmp_name'][$i];
                    $_FILES['gambar_tambah']['error'] = $_FILES['photo_gallery']['error'][$i];
                    $_FILES['gambar_tambah']['size'] = $_FILES['photo_gallery']['size'][$i];
                    $file_name=$this->crud->upload_file('gambar_tambah',$upload_image_path);
                    $image_data[$i]['image'] = $file_name;
                    $this->crud->add('table_name',$image_data[$i]);
                }