Как вы указываете на cid и получаете значение?
$ Item->?
array(1) { [0]=> object(__PHP_Incomplete_Class)#4 (4) { ["__PHP_Incomplete_Class_Name"]=> string(7) "Product" ["_param:protected"]=> array(40) { ["pid"]=> string(3) "540" ["cid"]=> string(2) "22" ["sid"]=> string(1) "1" ["tid"]=> string(1) "9" ["sales_volume"]=> string(1) "0" ["preorder_volume"]=> string(1) "0" ["viewed"]=> string(1) "0" ["weight"]=> string(4) "0.00" ["delivery_type"]=> string(6) "postal" ["cash_price"]=> string(4) "0.00" ["coupon_price"]=> string(4) "0.00" ["coupon_require"]=> NULL ["member_price"]=> NULL ["discount_code"]=> NULL ["special_offer"]=> string(1) "0" ["lan"]=> string(13) "eng,tchi,schi" ["special_offer_price"]=> string(4) "0.00" ["special_offer_begin"]=> string(19) "2010-09-06 11:25:05" ["special_offer_end"]=> string(19) "2010-09-06 11:25:05" ["bonus_point"]=> string(1) "0" ["tax"]=> string(4) "0.00" ["release_date"]=> string(19) "2010-09-06 11:25:05" ["begin_datetime"]=> string(19) "2010-07-13 14:41:26" ["end_datetime"]=> NULL ["delivery_status"]=> string(4) "24hr" ["stock"]=> string(1) "0" ["status"]=> NULL ["discon"]=> string(1) "0" ["product_desc"]=> string(0) "" ["model_num"]=> string(8) "ATH-BT03" ["rating"]=> string(0) "" ["recycle_id"]=> array(2) { [0]=> string(1) "5" [1]=> string(2) "20" } } } ["doc:private"]=> object(DOMDocument)#5 (0) { } } }