multidimensional session

[eluser]ciGR[/eluser]
I misunderstand what exactly you want.
the simple occasion is

Code:

$row => array(
            'basket_id'=>'1',
            'order_id'=>'1',
            'cus_id'=>$cusid,
            'product_id'=>$pro_id,
            'bas_quantity'=>1
    )

$cart = array($row);

$this->session->set_userdata('cart',$cart);

to add a new row just get the array from the session and add a new row

Code:

//get the cart
$cart = $this->session->userdata('cart');

//create the new row
$new_row => array(
            'basket_id'=>'2',
            'order_id'=>'2',
            'cus_id'=>$cusid,
            'product_id'=>$pro_id,
            'bas_quantity'=>1
    )

//add new row to cart
$cart[] = $new_row;

//or you can set it with a key, for find easier a session row by a id
// $cart[$pro_id] = $new_row;

//save cart to session
$this->session->st_userdata('cart',$cart);

also you can see the CI cart library if it can help you