Concrete5 get attribute select in block or controller

controller.php

<?php
function __construct($obj = null)
{
    parent::__construct($obj);
    $db = Loader::db();

// attribute to get like selection field
$n='nav_item_class';

// Get SelectOptionID as SOL
$q="SELECT ss.avSelectOptionListID as sol FROM AttributeKeys AS ak LEFT JOIN atSelectSettings AS ss ON ss.akID=ak.akID LEFT JOIN AttributeTypes AS at ON at.atID=ak.atID WHERE ak.akHandle LIKE '{$n}' AND ak.akCategory='pagekey' AND at.atHandle='select'";
$e = $db->getAll($q);
$sol=$e[0]['sol'];
    
if ($sol) {
  // Get values in order in displayOrder and not isDeleted=1
  $q="SELECT value FROM atSelectOptions WHERE isDeleted=0 AND avSelectOptionListID='{$sol}' ORDER BY displayOrder ASC";
	$e = $db->getAll($q);
        // Extract values
		foreach($e as $ak) {
			$i=$ak['value'];
		}
}

}
?>