Based on native Laravel's abilities. Hierarchical RBAC with callbacks.
Adjacency List’ed Closure Table database design pattern implementation for the Laravel framework.
Laravel 5 nested category/menu generator
Baum is an implementation of the Nested Set pattern for Laravel's Eloquent ORM.
Effective tree structures in Laravel 4-5
Hierarchical Structural Behavior to support Tree structures inside Doctrine2
Lets WordPress admins create searchable, hierarchically-organized documentation. Supports Markdown and syntax highlighting for code. Requires WP MVC.
Adds hierarchical group functionality to your BuddyPress-powered community site.
[READ-ONLY] A library to make a PSR-6 cache implementation supports cache hierarchy