PHP: Convert a renderable Drupal array's properties to children.

element_properties_to_children

/**
 * Convert all element properties to children
 *
 * @param  array $array An array with one or more keys that begine with '#' .
 *
 * @return array        Any key that began with '#' will have the # stripped.
 */
function element_properties_to_children($array) {
  $keys = array_map(create_function('$item', 'return substr($item, 1);'), array_keys($array));
  
  return array_combine($keys, $array);
}