Implement Hooks Using Array

What’s wrong with good old do_action? 😉 You could write a simple wrapper:

    function wpse81578_hook( $hook ) {
        do_action( $hook );
    }

If you’re looking for something dynamic, take a look at the do_atomic function of the Hybrid theme framework: it “adds contextual action hooks to the theme. This allows users to easily add context-based content without having to know how to use WordPress conditional tags. The theme handles the logic.”