'fixedPostVars' => array(
    '71' => array (
        array (
            'GETvar' => 'tx_extention_pi1[town_id]',
            'lookUpTable' => array(
                'table' => 'tx_extention_table',
                'id_field' => 'uid',
                'alias_field' => 'town_name',
                'addWhereClause' => ' AND NOT deleted',
                'useUniqueCache' => 1,
                'useUniqueCache_conf' => array(
                    'strtolower' => 1,
                    'spaceCharacter' => '-',
                    ),
                ),

            ),
        array (
            'GETvar' => 'tx_extention_pi1[uid]',
            'lookUpTable' => array(
                'table' => 'tx_extention_table2',
                'id_field' => 'uid',
                'alias_field' => 'IFNULL(NULLIF(pathsegment,""), agency_title)',
                'addWhereClause' => ' AND NOT deleted',
                'useUniqueCache' => 1,
                'useUniqueCache_conf' => array(
                    'strtolower' => 1,
                    'spaceCharacter' => '-',
                    ),
                ),

            ),
        ),

site.ru/agencies//name_agencies

site.ru/agencies/name_agencies