想获取网站中的所有超链接，使用的是php snoopy类

$sourceURL = $url; $snoopy->fetchlinks($sourceURL); $content = $snoopy->results;

获取的结果如下：

array (size=627) 0 => string 'http://www.alibaba.com/https://login.alibaba.com/' (length=49) 1 => string 'http://sh.vip.alibaba.com?tracelog=nav_ma' (length=41) 2 => string 'http://message.alibaba.com/feedback/default.htm?routeto=inbox&tracelog=nav_ma_mc' (length=80) 3 => string 'http://www.alibaba.com//hz-favorite.alibaba.com/favorite/favorite_home.htm?tracelog=nav_ma_fav' (length=94) 4 => string 'http://rfq.alibaba.com/form.htm?tracelog=header_myalibaba' (length=57) 5 => string 'http://hz.sourcing.alibaba.com/rfq/request/rfq_manage_list.htm?tracelog=nav_ma_mana_rfq' (length=87) 6 => string 'http://biz.alibaba.com/generalorders/list_orders.htm?tracelog=ma_mana_orders' (length=76) 7 => string 'http://sh.vip.alibaba.com/product/post_product_interface.htm?tracelog=newschp_nav_madp' (length=86) 8 => string 'http://sh.vip.alibaba.com/product/manage_products.htm?tracelog=newschp_nav_mamng' (length=80) 9 => string 'http://hz.sourcing.alibaba.com/rfq/quotation/rfq_not_quoted_manage_list.htm?nav_ma_rec_rfqs' (length=91) 10 => string 'http://www.alibaba.com/javascript:;' (length=35) 11 => string 'http://www.alibaba.com/Products?tracelog=beacon_cate_140704' (length=59) 12 => string 'http://rfq.alibaba.com/form.htm?tracelog=header_forbuyers' (length=57) 13 => string 'http://globalexpo.alibaba.com?tracelog=beacon_expo_150820' (length=57) 14 => string 'http://wholesale.alibaba.com?tracelog=nav_ws' (length=44) 15 => string 'http://buyer.alibaba.com/bizid_buyer?tracelog=nav_bi' (length=52) 16 => string 'http://tradeassurance.alibaba.com/bao/buyer_advertise.htm?tracelog=from_home_menu' (length=81) 17 => string 'http://activities.alibaba.com/alibaba/secure-payment.php?tracelog=beacon_payment_150114' (length=87) 18 => string 'http://ecredit.alibaba.com/ecl/buyer.htm?tracelog=beacon_credit_140704' (length=70) 19 => string 'http://inspection.alibaba.com/?tracelog=beacon_is_140704' (length=56) 20 => string 'http://buyer.alibaba.com/intelligence?tracelog=beacon_ti_140704' (length=63) 21 => string 'http://buyer.alibaba.com/forum?tracelog=beacon_df_140704' (length=56) 22 => string 'http://ask.alibaba.com/?tracelog=beacon_ta_140704' (length=49) 23 => string 'http://www.alibaba.com/javascript:;' (length=35) 24 => string 'http://seller.alibaba.com/memberships/index.html?tracelog=seller_channel_member_hp_header' (length=89) 25 => string 'http://seller.alibaba.com/learningcenter?tracelog=seller_channel_lc_hp_header' (length=77) 26 => string 'http://seller.alibaba.com/training.htm?tracelog=seller_channel_training_hp_header' (length=81) 27 => string 'http://sourcing.alibaba.com/?tracelog=newschp_nav_narfq' (length=55) 28 => string 'http://www.alibaba.com/javascript:;' (length=35)

怎么能把“http://www.alibaba.com/javascript:;”类似的URL去掉？