Hi Manish,
The multi-column cannot be viewed in HTML (it is single column there).
An alternative approach is to use CrossTab for multi-column. You add a crosstab (with only 1 cell) and group the items by ID (the ID should be consequential natural numbers: 1,2,3,4,5... ) Inside the crosstab you put a panel and put your items inside the panel. I have attached a sample project that uses crosstab to produce multi-column report. Take a look at the grouping of the crosstab - it determines how many columns you will have.
Kind regards,
Elian
the Telerik team