$array = array( array('A' => "Hello", 'B' => "World"),
                array('A' => "Goodnight", 'B' => "Vienna")
              );

function myFunc(&$item, $key) {
    $item = mysql_real_escape_string($item);
}

array_walk_recursive($array,'myFunc');

var_dump($array);

http://stackoverflow.com/questions/4085623/array-map-for-multidimensional-arrays

Using array_map() on multidimensional arrays

Using array_map() on multidimensional arrays

php, array

PHP