Menu php lista despegable

[petit89]

Código PHP:

<?php
while($row = mysqli_fetch_array($consulta_query)){ //while 1
 
echo $row['padre']
$consulta2 = "SELECT * FROM hijos WHERE padre='$row['padre']'";
//query
while($row2 = mysqli_fetch_array($consulta2_query)){
 
echo "- ".$row2['hijo']:
}//cierro while 2
 
}//cierro while 1
 
?>