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

            [subcategories] => Array
                (
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                        (
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                            [slug] => python
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                        )

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                        (
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                )

        )

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            [parent_category] => Array
                (
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                    [slug] => math
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            [subcategories] => Array
                (
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                        (
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                            [slug] => calculus
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                )

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

            [subcategories] => Array
                (
                    [0] => Array
                        (
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                            [slug] => physics
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        )

)