public function actionNewForum($cid = null)
    {
        $category = Category::find()->where(['id' => $cid])->limit(1)->one();
        if (empty($category)) {
            $this->error(Yii::t('podium/flash', 'Sorry! We can not find Category with this ID.'));
            return $this->redirect(['admin/categories']);
        }
        $model = new Forum();
        $model->category_id = $category->id;
        $model->visible = 1;
        $model->sort = 0;
        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            Log::info('Forum added', $model->id, __METHOD__);
            $this->success(Yii::t('podium/flash', 'New forum has been created.'));
            return $this->redirect(['admin/forums', 'cid' => $category->id]);
        }
        return $this->render('forum', [
            'model' => $model,
            'forums' => Forum::find()->where(['category_id' => $category->id])->orderBy(['sort' => SORT_ASC, 'id' => SORT_ASC])->all(),
            'categories' => Category::find()->orderBy(['sort' => SORT_ASC, 'id' => SORT_ASC])->all()
        ]);
    }