gistfile1.php

<?php 
function my_plugin_get_custom_fields($post_id) {
  $data = get_post_custom($post_id);
	foreach ($data as $k => $v) {
		$return[$k] = $v[0];
	}
	return $return;
}

$custom_fields = my_plugin_get_custom_fields($post_id);
extract($custom_fields, EXTR_OVERWRITE );