<?php
function custom_full_width_header_on_boxed_page(){
    if(is_front_page()){
        $site_style = sq_option('site_style', 'wide') == 'boxed' ? ' page-boxed' : '';
        $site_style = apply_filters('kleo_site_style', $site_style);
        echo '</div>';
        echo '<div class="custom-full-width-header-on-boxed-page">';
        echo do_shortcode('[rev_slider HomeFullwidth]');
        echo '</div>';
        echo '<div class="kleo-page' . $site_style . '">';
    }
}
add_action('kleo_header', 'custom_full_width_header_on_boxed_page', 9999);