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

Array
(
    [66.249.69.11] => Array
        (
            [time] => 1327790005
            [uri] => /portal/index.php/konten/detail/deputi-pencegahan/artikel/9897/pembahasan-reformasi-birokrasi-di-lingkungan-bnn
            [bot] => 
        )

    [101.255.16.14] => Array
        (
            [time] => 1327789926
            [uri] => /portal/index.php/backsite/post/load_script/1/bgiframe-superfish-supersubs
            [bot] => 
        )

    [66.249.68.2] => Array
        (
            [time] => 1327789958
            [uri] => /portal/index.php/konten/detail/deputi-pencegahan/artikel/10081/pemberdayaan-masyarakat-bebas-narkoba-bagi-lingkungan-sekolah-di-dki-jakarta
            [bot] => 
        )

    [38.107.179.209] => Array
        (
            [time] => 1327790034
            [uri] => /portal/
            [bot] => 
        )

)