Page Marking

I'm trying to create a bookmarked field, but I'm not sure how to relate tables. I created 3 User, Title and Pages tables. I even managed to relate to the user with cookie , but I can not think of a way to relate the title id.

<?php$login_cookie=$_COOKIE['login'];if(!isset($login_cookie)){header("Location: index.php");
    }

$con = mysqli_connect('localhost', 'root', '', 'lista');
$paginas = $_POST["paginas"];
$ins = "INSERT INTO paginas (paginas, usuario) VALUES ('".$paginas."','".$login_cookie."')";


if(mysqli_query($con, $ins)) {

echo "Registrado com sucesso!";

} else {
    echo "Erro ao registrar!";
}

mysqli_close($con);
?>
 ?>