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            [parent_category] => Array
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                    [slug] => math
                    [name] => Math
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            [subcategories] => Array
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                        (
                            [name] => ACT Math
                            [slug] => act-math
                            [id] => 1741
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                        (
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                            [slug] => algebra-1
                            [id] => 1725
                        )

                    [2] => Array
                        (
                            [name] => Algebra 2
                            [slug] => algebra-2
                            [id] => 1726
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                    [3] => Array
                        (
                            [name] => Calculus
                            [slug] => calculus
                            [id] => 1730
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                    [4] => Array
                        (
                            [name] => Common Core
                            [slug] => common-core
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                        (
                            [name] => Differential Equations
                            [slug] => differential-equations
                            [id] => 1731
                        )

                    [6] => Array
                        (
                            [name] => SAT Math
                            [slug] => sat-math
                            [id] => 1740
                        )

                )

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            [parent_category] => Array
                (
                    [id] => 1744
                    [slug] => science
                    [name] => Science
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            [subcategories] => Array
                (
                    [0] => Array
                        (
                            [name] => Astronomy
                            [slug] => astronomy
                            [id] => 1758
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                    [1] => Array
                        (
                            [name] => Chemistry
                            [slug] => chemistry
                            [id] => 1747
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                    [2] => Array
                        (
                            [name] => Physics
                            [slug] => physics
                            [id] => 1748
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                )

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            [parent_category] => Array
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                    [slug] => test-prep-exams
                    [name] => Test Prep and Exams
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            [subcategories] => Array
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                        (
                            [name] => ACT Science
                            [slug] => act-science
                            [id] => 1870
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)