Array
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            [parent_category] => Array
                (
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                    [slug] => languages
                    [name] => Languages
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            [subcategories] => Array
                (
                    [0] => Array
                        (
                            [name] => English
                            [slug] => english
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        (
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            [parent_category] => Array
                (
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                    [slug] => math
                    [name] => Math
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            [subcategories] => Array
                (
                    [0] => Array
                        (
                            [name] => Algebra 1
                            [slug] => algebra-1
                            [id] => 1725
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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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                        (
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                            [slug] => ged
                            [id] => 1866
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)