How to convert my old menu

[truth4oll]

I have menu with attribute - parent_id, how i can convert it to nested tree
Can you show example

[adiramardiani]

Same with this question, i want to integrate the menu with Yii2 Menu component, I found the tutorial (in green checked answer) but this case with parent_id not with nested strucutre like lft,rgt,level etc, how to full render with nested menu structure, with creocoder query in yii2 nested sets component ?

I hope you understand my question :)

[ebuzzz]

You can use my code in pull request #101 to build a tree based on a parent/child relation.