<div class="form-group">
	<select class="form-control" name="aircraft" required>
		<option value="INVALID" selected disabled>Select aircarft registration</option>
		<?php
			foreach ($aircrafts as $aircraft) {
				?>
					<option value="<?php echo $aircraft->id; ?>"><?php echo $aircraft->registration.' ('.$aircraft->location.')'; ?></option>		
				<?php
			}
		?>
	</select>
</div>