Array
(
    [1885] => Array
        (
            [parent_category_id] => 1885
            [parent_category] => Array
                (
                    [id] => 1885
                    [slug] => business-finance
                    [name] => Business and Finance
                )

            [subcategories] => Array
                (
                    [0] => Array
                        (
                            [name] => Business
                            [slug] => business
                            [id] => 1886
                        )

                    [1] => Array
                        (
                            [name] => CFA
                            [slug] => cfa
                            [id] => 1895
                        )

                    [2] => Array
                        (
                            [name] => Finance
                            [slug] => finance
                            [id] => 1890
                        )

                    [3] => Array
                        (
                            [name] => Financial Accounting
                            [slug] => financial-accounting
                            [id] => 1887
                        )

                    [4] => Array
                        (
                            [name] => GMAT
                            [slug] => gmat
                            [id] => 1902
                        )

                    [5] => Array
                        (
                            [name] => Macroeconomics
                            [slug] => macroeconomics
                            [id] => 1891
                        )

                    [6] => Array
                        (
                            [name] => Managerial Accounting
                            [slug] => managerial-accounting
                            [id] => 1888
                        )

                    [7] => Array
                        (
                            [name] => Microeconomics
                            [slug] => microeconomics
                            [id] => 1892
                        )

                    [8] => Array
                        (
                            [name] => Project Management
                            [slug] => project-management
                            [id] => 1894
                        )

                    [9] => Array
                        (
                            [name] => Series 3
                            [slug] => series-3
                            [id] => 1896
                        )

                    [10] => Array
                        (
                            [name] => Series 6
                            [slug] => series-6
                            [id] => 1897
                        )

                    [11] => Array
                        (
                            [name] => Series 65
                            [slug] => series-65
                            [id] => 1900
                        )

                    [12] => Array
                        (
                            [name] => Series 66
                            [slug] => series-66
                            [id] => 1901
                        )

                    [13] => Array
                        (
                            [name] => Series 7
                            [slug] => series-7
                            [id] => 1898
                        )

                )

        )

    [1802] => Array
        (
            [parent_category_id] => 1802
            [parent_category] => Array
                (
                    [id] => 1802
                    [slug] => computer-technology
                    [name] => Computer and Technology
                )

            [subcategories] => Array
                (
                    [0] => Array
                        (
                            [name] => Microsoft Excel
                            [slug] => microsoft-excel
                            [id] => 1805
                        )

                    [1] => Array
                        (
                            [name] => Microsoft PowerPoint
                            [slug] => microsoft-powerpoint
                            [id] => 1806
                        )

                    [2] => Array
                        (
                            [name] => Microsoft Publisher
                            [slug] => microsoft-publisher
                            [id] => 1809
                        )

                    [3] => Array
                        (
                            [name] => Microsoft Word
                            [slug] => microsoft-word
                            [id] => 1804
                        )

                )

        )

    [1723] => Array
        (
            [parent_category_id] => 1723
            [parent_category] => Array
                (
                    [id] => 1723
                    [slug] => math
                    [name] => Math
                )

            [subcategories] => Array
                (
                    [0] => Array
                        (
                            [name] => Statistics
                            [slug] => statistics
                            [id] => 1736
                        )

                )

        )

    [1744] => Array
        (
            [parent_category_id] => 1744
            [parent_category] => Array
                (
                    [id] => 1744
                    [slug] => science
                    [name] => Science
                )

            [subcategories] => Array
                (
                    [0] => Array
                        (
                            [name] => Ecology
                            [slug] => ecology
                            [id] => 1755
                        )

                    [1] => Array
                        (
                            [name] => Genetics
                            [slug] => genetics
                            [id] => 1753
                        )

                )

        )

)