Code:
$config['login_form'] = array (
array
(
'key' => 'email',
'value' => 'Email',
'rule' => 'trim|required|valid_email|xss_clean'
),
array
(
'key' => 'passwd',
'value' => 'Password',
'rule' => 'trim|required|alpha_numeric|xss_clean'
)
);