gistfile1.txt

namespace FbswitBlog\Controller\Plugin;

use Zend\Mvc\Controller\Plugin\AbstractPlugin;
use FbswitBlog\Service\Category as CategoryService;

class FbswitBlogService extends AbstractPlugin
{
    protected $categoryService;
   
    public function getCategoryService()
    {
        return $this->categoryService;
    }

    public function setCategoryService(CategoryService $service)
    {
        $this->categoryService = $service;
        return $this;
    }
}

//MY Module
public function getControllerPluginConfig()
    {
        return array(
            'factories' => array(
                'fbswitBlogService' => function ($sm) {
                    $serviceLocator = $sm->getServiceLocator();
                    $controllerPlugin = new Controller\Plugin\FbswitBlogService();
                    $controllerPlugin->setCategoryService($serviceLocator->get('fbswitblog_category_service'));
                    return $controllerPlugin;
                },
            ),
        );
    }

// From within my controller
$this->fbswitBlogService();