<?php

$start_array = array(
	array(
		'Service' => array(
			'id' => 6,
			'job_title' => 'director'
		),
		'Category' => array(
			array(
				'id' => 1,
				'category' => 'Accounting & Financial'
			),
			array(
				'id' => 3,
				'category' => 'Awards & Incentives'
			),
			array(
				'id' => 7,
				'category' => 'Data Management'
			)
		)
	),
	array(
		'Service' => array(
			'id' => 11,
			'job_title' => 'd'
		),
		'Category' => array(
			array(
				'id' => 7,
				'category' => 'Data Management'
			),
			array(
				'id' => 10,
				'category' => 'Internet Services'
			)
		)
	),
	array(
		'Service' => array(
			'id' => 12,
			'job_title' => 'e'
		),
		'Category' => array(
			array(
				'id' => 4,
				'category' => 'Business Consulting'
			),
			array(
				'id' => 7,
				'category' => 'Data Management'
			)
		)
	)
);


$category_array = array();


foreach ($start_array AS $array_element) {
	
	foreach ($array_element['Category'] AS $category) {
		$category_array[$category['category']][] = $array_element['Service']['job_title'];
	}

}


foreach ($category_array AS $department => $job_title_array) {

	print $department;
	
	foreach ($job_title_array AS $job_title) {
		print "\njob_title: ".$job_title;
	}
	
	print "\n\n";
	
}