Joomla: first and last menu item classes

gistfile1

<?php
$last_level_one_id = 0;
for($j=count($list)-1; $j>0; $j—){
  if($list[$j]->level == 1){
    $last_level_one_id = $list[$j]->id;
    break;
  }
} $first_start = true;
?>
Then we find the code below, this is the bit that adds classes to the menu elements and modify as shown below:
  if ($item->parent) {
    $class .= ' parent';
  }
  if (!empty($class)) {
    $class = ' class="'.trim($class) .'"';
  }
We will add a few lines of code between them to get the ‘first’ and ‘last’ class in the menu items. Our new block will look like:
  if ($item->parent) {
    $class .= ' parent';
  }
 
  //start first last changes
  if($first_start){
    $class .= ' first';
    $first_start = false;
  }else if ($item->shallower || $item->id == $last_level_one_id ) {
    $class .= ' last';
  }
  if ($item->deeper) {
    $class .= ' deeper';
    $first_start = true;
  }
  //end first last changes
  if (!empty($class)) {
    $class = ' class="'.trim($class) .'"';
  }