[{"_id":"customer1","verarray":["10.5.0-50_0","11.5.0-30_0"]},{"_id":"customer2","verarray":["11.0.0-30_0","11.5.0-80_0","12.5.0-111_0","13.3.0.21_0.31125","13.5.0.21_0","13.5.0-20_0"]},{"_id":"customer3","verarray":["11.5.0-95_0","12.6.0.131_0.33392","10.0.0-5_0","11.5.0.20_0.22028","12.6.0.131_0.33392"]}]

db.collection.aggregate([{$unwind:"$verarray"},{$sort:{verarray:1}},{$group:{_id:"$_id",verarray:{$push:"$verarray"}}}])