<?php
$array = array(
array(
"product_name"=> "Test Product",
"product_qty"=>"2.0000",
"product_price"=>"15.0000",
),
array(
"product_name"=>"Test 2",
"product_qty"=>"3.0000",
"product_price"=>"25.0000",
),
);
foreach($array as $pKey=>$product){
foreach($product as $key=>$option){
echo "<input type='hidden' name='{$key}_{$pKey}' value='$option'/>\n";
}
}