Something

<?php
$foodPries[vegetable][onion] = 0.5;
$foodPrice[vegetable][potato] = 1.0;
$foodPrice[vegetable][apple] = 2.5;
$foodPrice[fruit][orange] = 2.0;
$foodPrice[fruit][bacon] = 3.5;
$foodPrice[fruit][ham] = 5.0;
foreach ( $foodPriece as $category ) {
	foreach ( $category as $food => $price ) {
	$f_price = sprintf( "%01.2f", $price );
	echo "food: \$$f_price \n";
	}
}
?>