function kester_insert_hero_before_content($content) {
    if ( is_singular() && ! is_page() ) { // all single CPTs
        global $post;
        setup_postdata($post);

        // Full hero/banner HTML
        $hero = '<div class="reactheme-breadcrumbs porfolio-details">
                    <div class="reactheme-breadcrumbs-inner" style="background:">
                        <div class="container">
                            <div class="row">
                                <div class="col-md-12">
                                    <div class="breadcrumbs-inner bread-"> 
                                        <h1 class="page-title">' . get_the_title() . '</h1>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                 </div>';

        wp_reset_postdata();

        // Prepend hero to the original content
        return $hero . $content;
    }

    return $content;
}
add_filter('the_content', 'kester_insert_hero_before_content');