醉了

 <?php
					 //獲取父類下的子類的個數
					 foreach ($CATEGORYS as $key => $value) 
						{
							$i=0;
							foreach ($CATEGORYS as $k => $val) 
							{
								if($val['parentid'] == $value['catid'])
								{
									$i++;
								}
							}
						 	$arr[$key]['num'] = $i;
						}
						foreach ($arr as $key => $value) {
							if($value['num'] == 0)
							{
								unset($arr[$key]);
							}
						}
						foreach ($data as $key => $v) 
							{
								foreach ($arr as $key => $value) 
								{
									$data[$key]['nav']=$value['num'];
								}
							}
							print_r($data);die;
						die;
						?>