category_name
is a bit misleading, it expects the slug, not the name. Try:
$content_args = array(
'post_type' => 'Content_Widget',
'category_name' => $cat[0]->slug
);
category_name
is a bit misleading, it expects the slug, not the name. Try:
$content_args = array(
'post_type' => 'Content_Widget',
'category_name' => $cat[0]->slug
);