How to implement custom submenu Bootstrap?

There's that tricky submenu in Bootstrap 850f0de9cc874416bc9e7da8443d4a0f.png
the full width I already implemented it, but the second question is: how to make 4 column li-NIS. Set the width to 25%, display: inline-block but it didn't help. Single column is fine, 4 way...
a31139e4ac9842bdb5b2d9ceeae1a025.png
How to be here?
July 9th 19 at 11:10
1 answer
July 9th 19 at 11:12
Solution

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