//Render the main menu In your template and block using below code

<?php
    $main_menu_tree = menu_tree(variable_get('menu_main_links_source', 'main-menu')); 
    print drupal_render($main_menu_tree);

?>



//Render user menu In your template and block using below code

<?php  
    $main_menu_tree1 = menu_tree(variable_get('menu_main_links_source', 'user-menu')); 
    print_r(drupal_render($main_menu_tree1));
 ?>