This Enfold function displays the category below the title in the Avia Blog Grid element.

add_filter('avf_postslider_show_catergories', 'avf_postslider_show_catergories_mod', 10, 1);
function avf_postslider_show_catergories_mod($category) {
 	$category = 'show_business'; // or show_elegant
	return $category;
}

To output the categories above the title you can use the following CSS:

#top .avia-content-slider .entry-content-header {
    display: flex;
    flex-direction: column-reverse;
}
.html_modern-blog #top .post-entry .blog-categories {
    top: 10px;
}