Here is a library for developpers which help them to use categories and posts whithin a simple class.

romainguillaume

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LordPretender

With this class (singleton), you will be able to do a lot of things with your categories. 
There is a lot of methods available to do what you need, what you want to do.
If a method is missing, thanks to tell me and I will add it, if possible.

Alternatives to Category class

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