You need to edit this line:
Open your map editor, and check for your towns ID´s. For example: You made MAIN town 1, NOrth town 2, south town 3, you need to edit like this:
// list of towns on ots
$towns_list[0] = array(1 => 'Main', 2 => 'North', 3 => 'South'); // list of towns, id =>...