there are no nid to change the quest_shop name everytime.
You could have follow the instruction/guide given.
prontera,179,195,3 script Basic Quests 757,{ callfunc "qshop5", 1, 2, 3; } // open shop 1, 2, 3
prontera,179,195,3 script Basic Quests 757,{ callfunc "qshop5", 4, 5; } // open shop 4, 5
and etc...