session variable
$this->session->userdata('email') =>
$this->session->userdata('group') =>
$this->session->userdata('id') =>
$this->session->userdata('user_id') =>

Array
(
    [141.0.10.17] => Array
        (
            [time] => 1329988656
            [uri] => /portal/index.php/backsite/post/load_script/1/bgiframe-superfish-supersubs
            [bot] => 
        )

    [118.96.101.25] => Array
        (
            [time] => 1329988711
            [uri] => /portal/index.php/backsite/post/load_script/1/bgiframe-superfish-supersubs
            [bot] => 
        )

    [66.249.69.173] => Array
        (
            [time] => 1329988721
            [uri] => /portal/index.php/suara_masyarakat/detail/4530
            [bot] => 
        )

    [38.107.179.209] => Array
        (
            [time] => 1329988726
            [uri] => /portal/index.php/home
            [bot] => 
        )

)