How to implement a hook system?

Question

Yii

It is necessary to transfer data from different modules to one module, that is, to collect some information.
Examples:
1) There is a "Menu" module, and each module adds its own items to it, then the Menu is rendered.
2) There is a "Settings" module, and any module can add some data (html for example) to the module page
How to implement this?
Suggestions:
Through Bootstrap in modules?
Through events + callback?
But how to make the menu build under certain conditions, for example, on a certain page, etc.?
So that extra code does not hang out, bootsrap / extra events and handlers, etc. are not executed once again