Doesn't active record sanitize input anymore?

[eluser]FinalFrag[/eluser]
I have made a new controller and model, just to test this. I will share the code with you, maybe this helps you guys to solve my problem.

Controller: todoManagement.php

Code:

<?php
class TodoManagement extends Controller {
function TodoManagement()
{
    parent::Controller();
    $this->load->model('Testmodel');
}

function index()
{
    // Write something to the testmodel
    $this->Testmodel->write("' this should <b>get</b> ' filtered '");
}
}

Model: testmodel.php

Code:

<?php
class Testmodel extends Model {
function Testmodel()
{
    // Call the Model constructor
    parent::Model();
}

function write($string)
{
    $this->db->set('userId', 1);
    $this->db->set('name', $string);
    $this->db->insert('finalfrag_todoLists');
}
}

When I execute this code by visiting www.myurl.com/todoManagement the following gets put in the database:

Code:

1
' this should <b>get</b> ' filtered '

But that's not what I want to written to the database (for SQL injection reasons). What I want is

Code:

1
\' this should <b>get</b> \' filtered \'

My test code was done on the same CI install as my previous posts... I will go and test it on a different install...

If you can spot my mistake... please help me...