$route['board/(:any)'] = 'board/index';

<?php

class Board extends Controller 
{
    function Board() 
    {
        parent::Controller();
        
    }
    function index()
    {
        // test.com/1:board/2:게시판명/3:액션(lists,view)/4:번호
        echo('Board Controller <br/>');
        switch($this->uri->segment(3))
        {
            case 'lists': lists($this->uri->segment(2)); break;
            case 'view': view($this->uri->segment(2)); break;
            default: lists($this->uri->segment(2)); 
        }
        
    }
    function lists($board_id)
    {
        echo('Board Controller / lists <br/>');
    }
    function view($board_id)
    {
        echo("Board Controller / $board_id / view <br/>");
        
    }
}