Hi @rajjangid911,
you can delete all the items in the custom design list view, after the user selected the category.And then run similar procedure like the one you run for creating the items.the only difference that before creating them you will add a if-then statement with something like this:
if select list item from your items categories is equal to get selection ( this is the category selected.Create your item.
BTW, we doesn’t recommend to use deep host’s extensions as he doesn’t support his extensions 
1 Like