$filter = (new DBCFilterablePortfolioTabsTermsFilter());
$filter->init();

class DBCFilterablePortfolioTabsTermsFilter {

    private $props;
    private $atts;

    public function init() {
        add_filter('et_pb_module_shortcode_attributes', array($this, 'add_terms_filter'), 10, 3);
        add_filter('et_module_shortcode_output', array($this, 'remove_terms_filter'));
    }

    public function add_terms_filter($props, $atts, $slug) {
        if ($slug !== 'et_pb_filterable_portfolio') return $props; 
        $this->props = $props;
        $this->atts = $atts;
        add_filter('get_terms', array($this, 'portfolio_tabs_filter'));
        return $props;
    }

    public function portfolio_tabs_filter($terms) {
        return apply_filters('dbc_filterable_portfolio_tabs_terms', $terms, $this->props, $this->atts);
    }

    function remove_terms_filter($content) {
        remove_filter('get_terms', array($this, 'portfolio_tabs_filter'));
        return $content;
    }
}

add_filter('dbc_filterable_portfolio_tabs_terms', 'dbc_sort_filterable_portfolio_tabs', 10, 3);

function dbc_sort_filterable_portfolio_tabs($terms, $props, $atts) {

    $tab_category_slugs = 'charlie,echo,bravo'; // <- *** REPLACE these with your category slugs ***

    if (!is_array($terms)) return $terms;
    $slugs = explode(',', $tab_category_slugs);
    $slugs = array_reverse($slugs);
    foreach($slugs as $slug) {
        $slug = trim($slug);
        foreach($terms as $k=>$term) {
            if (isset($term->slug) && $term->slug === $slug) {
                $terms = array($k=>$term) + $terms;
                break;
            }
        }
    }
    $terms = array_values($terms);
    return $terms;
}