如何正确打印并比较$ SESSION？

I'm creating a shopping cart. Only with session variables. I want something simple, no database, it is only for initial system (later that perhaps use database and logins)

I click in a product and use URL to add in SESSION variable

Exemple Product: Orange

Sent url

site.com/?page=buy&add=Orange&type=fruit

Then...

session_start();

//Create 'cart' if it doesn't already exist
if (!isset($_SESSION['SHOPPING_CART'])){ $_SESSION['SHOPPING_CART'] = array(); }

if (isset($_GET['add'])){
//Adding an Item
//Store it in a Array
$ITEM = array(
    //Item name     
    'name' => $_GET['add'],
    'type' => $_GET['tipo'],

    //Item Price

    );

For print, I use:

 foreach ($_SESSION['SHOPPING_CART'] as $itemNumber => $item) {
 echo $item['type']; 
 echo $item['name']; 

}

But My problem is, when I print I see something like this: Fruit Orange Fruit Apple Fruir Banana

Someone can tell me how do I only appear once "Fruit". How do I comparison is already is repeated?

Example that I want: Fruit Orange Apple Banana

   $itemType = ""; 
   foreach ($_SESSION['SHOPPING_CART'] as $itemNumber => $item) {
     if($itemType == $item['type']) {
       // skip...don't print again
     } else { 
        echo $item['type']; 
     }
     echo $item['name']; 
     $itemType = $item['type'];
    }

You'd need to add another level to the cart, e.g.

$_SESSION['SHOPPING_CART'][$_GET['tipo']][$_GET['add']]

so you'd end up with a nested array structure:

 SHOPPING_CART -> fruit -> orange
               -> fruit -> apple
               -> vegetable -> pizza

$itemType = ""; 
foreach ($_SESSION['SHOPPING_CART'] as $itemNumber => $item) {
 if($itemType == $item['type']) {
   // skip...don't print again
 } else { 
    echo $item['type']; 
 }
 echo $item['name']; 
 $itemType = $item['type'];
}

Great!

however if I have a problem. If I add a fruit, then a food, then a fruit:

Print:
   Fruit:
      Banana
      Banana
   Food:
      Meat x
   Fruit:
      Apple

However, it´s possible to not repeat the "banana" banana?

Print:
   Fruit:
      Banana
      Apple
   Food:
      Meat x