how to show rows in 3*3 matrix form

declare @demo table(id int identity(1,1),columname int null)
insert into @demo(columname)
select  yourcolumn from yourtable

declare @temp table(kid int identity(1,1),col1 int null,col2 int null,col3 int null)

declare @i int=1
declare @count int=0
declare @j int=1
declare @m int=0
set @count=(select count(*) from h_ptmast)
while(@i<=@count) begin

      if(@j=1)begin
        insert into @temp(col1)
        select columname from @demo where id=@i
        set @m=@m+1
      end
      else if(@j=2)begin
         update @temp set col2=columname
          from @demo where id=@i and kid=@m
      end
      else begin
        update @temp set col3=columname
          from @demo where id=@i and kid=@m
      end
     if(@j=3)begin
       set @j=1
     end
     else begin
       set @j=@j+1
     end

  set @i=@i+1

end

select col1,col2,col3 from @temp