I am using column 2 or more, but it is not showing on multiple column

Most likely you are using one list for each different item. Please create Multiple Lists and then add Multiple Similar Items under the correspondent list. Then it will group multiple items under each list and display lists in multiple columns. The most important thing to remember is that the base pillars of this plugin are Lists, not individual businesses/Link or categories. A list is simply a niche or subtopic to group your relevant businesses or any type of Listings together.