how to bind 2 dropdownlist from one public function

i have 2 ddl on one aspx apage but in different panel.
i create a function. this function fetch data frm database nd fill the list.
but the problem is i want to fill both ddl with this function.
dont want to create same function for my 2nd list
 the function is
private void CategoryListBind()
    {
        ItemCategoryBE objCat = new ItemCategoryBE();
        objCat.ID = 0;
        DataSet ds = new DataSet();
        ds = ItemCategoryBL.SelectCategoryBL(objCat);         
        ddlCate.DataSource = ds;
        ddlCate.DataTextField = "CName";
        ddlCate.DataValueField = "ID";
        ddlCate.DataBind();
}

if i want to fill 2nd ddl2 through this code but due to list name i cannot able to do
can any one please tell me the FACTORY which can fill any dropdownlist on the page. i hope you'll get my point

Thanks