$config['base_url'] = "http://production.host.com"; // the production value of $_SERVER['SERVER_NAME'] essentially

$route['companyone'] = 'sso/platformsso/requestgenericsso/companyone';
$route['companyone/(:any)'] = 'sso/ptlatformsso/requestgenericsso/companyone/$1';

<VirtualHost 192.168.1.1:80>
    ServerAdmin me@host.com
    DocumentRoot "/var/mnt/a"
    ServerName "a.tmbc.com"
    ErrorLog logs/a.error.log
    Alias ssaml /var/simplesamlphp/www
</VirtualHost>
<Directory "/var/mnt/a">
    Options  FollowSymLinks
    AllowOverride All
    Order allow,deny
    Allow from all
</Directory>

Directory populated using CIFS mount: mount -t cifs //1.2.3.4/a /var/mnt/a -o rw,username=un,password=pwd,uid=48 --verbose1

<VirtualHost 192.168.1.1:80>
    ServerAdmin me@host.com
    DocumentRoot "/var/www/html/b"
    ServerName "b.host.com"
    ErrorLog logs/b.error.log
    Alias ssaml /var/simplesamlphp/www
</VirtualHost>
<Directory "/var/www/html/b">
    Options FollowSymLinks
    AllowOverride All
    Order allow,deny
    Allow from all
</Directory>

Directory populated using SVN checkout: svn checkout file:///var/svn/repo/trunk /var/www/html/b