$posts = $posts->map(function($post) use ($company, $vacancy) {
    switch ($post->type) {
        case $company:
            return $post->only([
                'id',
                'name',
                'slogan',
                'logo'
            ]);
            break;
        case $vacancy:
            return $post->only([
                'id',
                'title',
                'price',
                'schedule',
                'employment',
                'company'
            ]);
            break;
    }
});