escaping quotes when updating db

[eluser]murichej[/eluser]
ajax code from view:

Code:

$('#save_personal').click(function() {
    $.ajax({
        type: "POST",
        url: "index.php/profile/savePersonalInformation",
        data: { name: $('#name').val(), surname: $('#surname').val(), about: $('#about').val() },
        success: function(ret) {
            if (ret)
                location.reload();
        },
    });
});

controller code:

Code:

public function savePersonalInformation()
{
    $id = $this->id_admin;
    
    $data['name'] = trim($_REQUEST['name']);
    $data['surname'] = trim($_REQUEST['surname']);
    $data['about'] = trim($_REQUEST['about']);
    
    $OK = $this->Admin_model->setPersonalInformation($id, $data);
    
    if ($OK) {
        echo 1;
        exit;
    }
    
}

model code:

Code:

function setPersonalInformation($id, $data)
{
          
    $this->db->where('id', $id);
    $this->db->update('admin', $data);
    
    if ($this->db->affected_rows() == '1')
        return TRUE;
    
    return FALSE;
}