The7 theme breadcrumbs integration under the main menu

functions.php

//put in in functions.php in main or child theme

//add breadrums to main menu
function custom_breadcrumbs() {
	$config = Presscore_Config::get_instance();
	// get breadcrumbs
	if ( $config->get( 'page_title.breadcrumbs.enabled' ) ) {
		$breadcrumbs = presscore_get_page_title_breadcrumbs();
	} else {
		$breadcrumbs = '';
	}
	echo '<div class="custom-breadcrumbs">' . $breadcrumbs . '</div>';
}

add_action( 'presscore_primary_nav_menu_after' , 'custom_breadcrumbs');

//override title to remove old breadcrums 
function presscore_page_title_controller() {
	$config = Presscore_Config::get_instance();

	if ( ! ( $config->get( 'page_title.enabled' ) || $config->get( 'page_title.breadcrumbs.enabled' ) ) ) {
		return;
	}

	$show_page_title = ( presscore_is_post_title_enabled() && presscore_is_content_visible() );
	if ( ! $show_page_title ) {
		return;
	}

	$page_title_wrap_attrs = '';

	$parallax_speed = $config->get( 'page_title.background.parallax_speed' );
	if ( $parallax_speed ) {
		$page_title_wrap_attrs .= ' data-prlx-speed="' . $parallax_speed . '"';
	}

	$title_height = absint( $config->get( 'page_title.height' ) );
	$page_title_wrap_attrs .= ' style="min-height: ' . $title_height . 'px;"';

	$page_title_wrap_table_style = ' style="height: ' . $title_height . 'px;"';

	?>

    <div <?php echo presscore_get_page_title_wrap_html_class( 'page-title' ), $page_title_wrap_attrs; ?>>
        <div class="wf-wrap">
            <div class="wf-container-title">
                <div class="wf-table"<?php echo $page_title_wrap_table_style; ?>>

					<?php
					// get page title
					if ( $config->get( 'page_title.enabled' ) ) {
						$page_title = '<div class="wf-td hgroup"><h1 ' . presscore_get_page_title_html_class() . '>' . presscore_get_page_title() . '</h1></div>';
					} else {
						$page_title = '';
					}
					$page_title = apply_filters( 'presscore_page_title', $page_title );

					// get breadcrumbs
					$breadcrumbs = '';

					// output
					if ( 'right' == $config->get( 'page_title.align' ) ) {
						echo $breadcrumbs, $page_title;
					} else {
						echo $page_title, $breadcrumbs;
					}
					?>

                </div>
            </div>
        </div>
    </div>
	<?php
}

style.css

/*positioning breadcrumbs to right bottom corner*/
#primary-menu {
    position: relative;
}

#primary-menu .custom-breadcrumbs {
    position: absolute;
    bottom: 0;
    right: 0;
}