add custom element inside menu-element in wordpress - 2nd variant

gistfile1.txt

add_filter( 'walker_nav_menu_start_el', 'wpse_45647_add_custom_content', 'icl_post_languages', 10, 2 );

function wpse_45647_add_custom_content( $item_output, $item ){

    if ('Choose Country' == $item->title) {// choose li-element here

        $custom = icl_post_languages();//something custom to add

        return str_replace( '<a ', $custom . '<a ', $item_output );

    } else {
        return $item_output;
    }
}