how to upload two files on same form different path in codeigniter

1if($this->input->post('Submit')){
2
3//-----------Image File Section Start Here -----------//
4
5 $config['upload_path'] = './uploads/';   // Directory 
6$config['allowed_types'] = 'jpg|jpeg|bmp|png';  //type of images allowed
7$config['max_size'] = '30720';   //Max Size
8$config['encrypt_name'] = TRUE;   // For unique image name at a time
9
10$this->load->library('upload', $config);  //File Uploading library
11$this->upload->do_upload('userfile');  // input name which have to upload 
12$video_upload=$this->upload->data();   //variable which store the path
13
14//--------------End of Image File  Section------------------------//
15
16
17
18//---------Thumbnail Image Upload Section Start Here -----------//
19
20$config2['upload_path'] = './thumb/';   // Directory 
21$config2['allowed_types'] = 'jpg|jpeg|bmp|png'; //type of images allowed
22$config2['max_size'] = '30720';   //Max Size
23$config2['encrypt_name'] = TRUE;   // For unique image name at a time
24
25
26$this->upload->initialize($config2); //we can not use upload library again and again it will not initialize again and again so thats why i have used initialize 
27$this->upload->do_upload('txt_thumb');  // File Name
28$thumbnail_upload=$this->upload->data(); // store the name of the file 
29
30//--------End of Thumbnail Upload Section-----------//
31
32
33
34    $date=date("d-m-Y");  // Store current date in variable 
35
36   // Here the database query to insert
37
38    $data = array(
39    'parent_id'=> $this->input->post('txt_parent'),
40    'cat_id' => $this->input->post('txt_category'),
41    'title'=> $this->input->post('txt_title'),
42    'status' => $this->input->post('txt_status'),
43    'featured' => $thumbnail_upload['file_name'],
44    'image' => $video_upload['file_name'],
45    'time'=>$date
46    );
47
48       $sql_ins= $this->Insimage->insertimage($data);
49       if($sql_ins)
50       {
51           $data['Success'] = "Image has been succesfully inserted!!";
52       }

1    private function upload_files($path, $title, $files)
2    {
3        $config = array(
4            'upload_path'   => $path,
5            'allowed_types' => 'jpg|gif|png',
6            'overwrite'     => 1,                       
7        );
8
9        $this->load->library('upload', $config);
10
11        $images = array();
12
13        foreach ($files['name'] as $key => $image) {
14            $_FILES['images[]']['name']= $files['name'][$key];
15            $_FILES['images[]']['type']= $files['type'][$key];
16            $_FILES['images[]']['tmp_name']= $files['tmp_name'][$key];
17            $_FILES['images[]']['error']= $files['error'][$key];
18            $_FILES['images[]']['size']= $files['size'][$key];
19
20            $fileName = $title .'_'. $image;
21
22            $images[] = $fileName;
23
24            $config['file_name'] = $fileName;
25
26            $this->upload->initialize($config);
27
28            if ($this->upload->do_upload('images[]')) {
29                $this->upload->data();
30            } else {
31                return false;
32            }
33        }
34
35        return $images;
36    }
37