Display membership pricing along with regular pricing.

my_woocommerce_get_price_html.php

<?php

// Display membership pricing along with regular pricing.
function my_woocommerce_get_price_html($price, $product) {

	// Get all levels.
	$all_levels = pmpro_getAllLevels(true, true);

	// Get original price.
	$reg_price = wc_price($product->get_regular_price());

	// Find all membership prices for this product.
	$member_prices = array();
	foreach($all_levels as $level) {
		$member_price = get_post_meta($product->id, "_level_{$level->id}_price", true);
		if(!empty($member_price) || $member_price === '0')
			$member_prices[$level->id] = $member_price;
	}

	// Build list.
	$list = "<ul><li>Regular Price: {$reg_price}</li>";
	foreach($member_prices as $level_id => $price) {
		$wc_price = wc_price($price);
		$list .= "<li>{$all_levels[$level_id]->name} Price: {$wc_price}</li>";
	}
	$list .= "</ul>";

	return $list;
}
add_filter('woocommerce_get_price_html', 'my_woocommerce_get_price_html', 10, 2);