[taxonomy] => Array
                                                (
                                                    [12] => Array
                                                        (
                                                            [0] => 647
                                                            [1] => 653
                                                            [2] => 652
                                                        )

                                                    [41] => Array
                                                        (
                                                            [0] => 737
                                                            [1] => 649
                                                        )

                                                    [26] => Array
                                                        (
                                                            [0] => 591
                                                            [1] => 582
                                                            [2] => 854
                                                        )

                                                    [44] => Array
                                                        (
                                                            [0] => 748
                                                            [1] => 749
                                                        )

                                                )

// into

[taxonomy] => Array
                                        (
                                            [12] => Array
                                                (
                                                    [647] => 0
                                                    [653] => 0
                                                    [652] => 0
                                                    [646] => 0
                                                    [648] => 0
                                                )

                                            [41] => Array
                                                (
                                                    [737] => 0
                                                    [649] => 0
                                                    [736] => 0
                                                    [650] => 0
                                                    [659] => 0
                                                )

                                            [16] => Array
                                                (
                                                    [626] => 0
                                                    [654] => 0
                                                    [627] => 0
                                                    [628] => 0
                                                    [629] => 0
                                                    [630] => 0
                                                )

                                            [14] => Array
                                                (
                                                    [741] => 0
                                                    [636] => 0
                                                    [637] => 0
                                                    [645] => 0
                                                    [633] => 0
                                                    [635] => 0
                                                    [634] => 0
                                                    [745] => 0
                                                    [643] => 0
                                                )