courses.php

<?php
$dom = new DOMDocument();
$dom->preserveWhiteSpace = false;
$dom->load('xml.xml');

$xpath = new DOMXPath($dom);
$courses = array();

foreach( $xpath->query('.//course/area[text()="Educação e Pedagogia"]/..') as $node) {
    $values = array();

    foreach ($node->childNodes as $child) {
        $values[$child->nodeName] = $child->nodeValue;
    }

    $courses[] = $values;
}

var_dump($courses);