I have this code
$__routes = array( \"Home\" => \"index.php\", \"Contact\" => \"contact.php\", \"Register\"
If I'm understanding your intention correctly, You could include one file into the other one and merge the arrays:
$merged_aray = array_merge($__routes, $array2);
Where $array2 equals:
$array2
"Support" => "support.php", "Success" => "success.php", "Act" => "activate.php"