Pass multi-dimensional array to hidden form

[eluser]rochellecanale[/eluser]
I created a loop like this but i want to format like this:
Product ID: 1
Name: Test
Price: Test
.
.
.
Here is my code

Code:

$products = unserialize($this->session->userdata('product_list'));
    foreach($products as $element => $inner_array){
        echo "<strong>Product ID: ".$element."</strong><br>";
        foreach($inner_array as $items){
            echo $items."<br>";
        }
    }

How can i format like that?