WooCommerce: Changes how price is displayed

functions.php

<?php

// Changes how price is displayed

add_filter( 'woocommerce_get_price_html', 'wpa83367_price_html', 100, 2 );
function wpa83367_price_html( $price, $product ){
	$return = str_replace( '<ins>', 'Por: <ins>', $price );
	$return = str_replace( '<del>', '<small class="price-from">De: <del>', $return );
	$return = str_replace( '</del>', '</del></small><br/>', $return );
	
	return $return;
}