How to make horizontal variable set instead of vertical columns in catalog items service portal.

[Jaya Srivastava]

I am working on service portal and there while creating a catalog item I want the columns of variable set to be in horizontal (one row and many columns) but its coming vertical ( two column and many row) . Also, I want that there should be a scroller at the bottom to move from right to left and vice-versa in a row. On adding the data to columns the row should increase automatically one below the other. Please provide a suitable solution for that. The screenshot of the form is attached here.

Thankyou.

[Jaya Srivastava]

The issue with MRVS is that I want to avoid that another window which is opening after pressing add button of MRVS. So for removing that we need to create a widget. 

[jrmarkel]

Try the tabbed solution:

How To: Create a Tabbed Catalog Item in Service Portal