My Code :)

my-code.php

public function edit($id = NULL){

		if(!empty($id)){

			// LOAD SESSION DATA
			$session_data = $this->session->userdata('userLogData');

			// LOAD DATA FROM DATABASE
			$assetObj = $this->assetModel->getAssetRow($id);
			$categoryList = $this->assetModel->getDataList('category');
			$cond = array('cat_id' => $assetObj->cat_id); // SubCatCondition
			$subCategoryList = $this->assetModel->getDataList('sub_category',$cond);
			$statusList = $this->assetModel->getDataList('asset_status');
			$departmentList = $this->assetModel->getDataList('department');

			// CONFIG DATA SEND TO PAGE
			$data['title'] = 'เพิ่มข้อมูลทรัพย์สินและครุภัณฑ์';
			$data['userID'] = $session_data['user_id'];
			$data['name'] = $session_data['name'];
			$data['categoryResult'] = $categoryList;
			$data['subCategoryResult'] = $subCategoryList;
			$data['statusResult'] = $statusList;
			$data['departmentResult'] = $departmentList;
			$data['assetData'] = $assetObj;

			// DO ACTION EDIT WHEN SUBMIT
			if($this->input->post('asset_edit') != NULL){

				if(!empty($_FILES['asset_img']['tmp_name'])){
					// CONFIG DESTINATION PATH
					$thumbPath = str_replace(SELF,'',FCPATH).'assets/images/asset_image/thumb';
					$resizePath = str_replace(SELF,'',FCPATH).'assets/images/asset_image/resize';
					$thumbName = 'asset_cover_thumb'.date('YmdHis');
					$resizeName = 'asset_cover_resize'.date('YmdHis');

					// THUMB IMAGE 100x100
					if($_FILES['asset_img']['tmp_name']){
						@unlink($thumbPath.$assetObj->assetThumbPic);
						$thumb = $this->myupload->imgUploadRatioY($_FILES['asset_img'], $thumbPath, $thumbName, 'gif', 100);
					}else{
						$thumb = '';
						$this->myupload->error = '';
					}

					// RESIZE IMAGE 400x400
					if($_FILES['asset_img']['tmp_name']){
						@unlink($resizePath.$assetObj->assetFullPic);
						$resize = $this->myupload->imgUploadRatioY($_FILES['asset_img'], $resizePath, $resizeName, 'gif', 400);
					}else{
						$resize = '';
						$this->myupload->error = '';
					}
				}else{
					$thumb = $assetObj->assetThumbPic;
					$resize = $assetObj->assetFullPic;
				}

				$this->assetModel->assetUpdate($id,$thumb,$resize);
				redirect('asset/page/'.$this->uri->segment(4),'refresh');
			}

			// LOAD PAGE
			$this->load->view('templates/header', $data);
			$this->load->view('templates/userPanel', $data);
			$this->load->view('asset_edit', $data);
			$this->load->view('templates/footer', $data);
		}else{
			redirect('asset', 'refresh');
		}
	}