Help with route regex if specific words are present

[eluser]Imran Tariq[/eluser]
Instead of using this
[quote author="CroNiX" date="1294967168"]
$route['about'] = 'custom_page/about';
$route['home'] = 'custom_page/home';
$route['help'] = 'custom_page/help';[/quote]
You should try this

$route['about|home|help'] = 'custom_page/$1';