Always show renew links for certain PMPro levels if the member already has that level.

my_pmpro_always_show_renew_levels.php

// always show renew links for certain levels if the member already has that level.

function my_pmpro_always_show_renew_levels( $show, $level ){

  /*--- change this line to the levels you want to show a renew link---*/
  $show_levels = array( 1, 2 );

  if( in_array( $level->id, $show_levels ) ) {
    $show = true;
  }
  return $show;
}
add_filter( 'pmpro_is_level_expiring_soon', 'my_pmpro_always_show_renew_levels', 10, 2 );