Code
private void loadmenu(int programid)
        {
            
            
            bll = new Customer.BLL.ActionBLL();
            DataSet dstopmenus = bll.GetTopMenu();
            DataSet dssecond = bll.GetSecondMenusByProgram(programid);
            DataSet dsuser = bll.GetSecondmenubyuserAndprogram(userid, programid);
            int i = 0;
            CheckBoxList ck = new CheckBoxList();
            ck.Items.Add(new ListItem("ddddddddsdfsf", "sdfsfddddddddddd"));
            Panel1.Controls.Add(ck);
            foreach (DataRow drtop in dstopmenus.Tables[0].Rows)
            {
                Table table = new Table();

                CheckBoxList ckl = new CheckBoxList();
                ckl.ID = (i++).ToString();
                ckl.EnableViewState = true;
                

            
                DataRow[] drs = dssecond.Tables[0].Select("ParentID=" + drtop["ActionID"].ToString());
                CheckBoxList  list=new CheckBoxList();  
                
                foreach (DataRow dr in drs)
                {
                   
                    ListItem li = new ListItem(dr["MenuName"].ToString(), dr["ActionID"].ToString());
                    DataRow[] temp = dsuser.Tables[0].Select("ActionID=" + dr["ActionID"].ToString());
                    if (temp.Length != 0)
                        li.Selected = true;

                    ckl.Items.Add(li);
              
                                        
                }
                Panel1.Controls.Add(ckl);
              
              
            }
            
        }

Code
   foreach (Control control in Panel1.Controls)