Making directories with recursive function

[thara]

Basically I am having an array something like below, this array has number of categories and sub, sub sub categories.

$categories = array(
    array('id' => 1,  'parent' => 0, 'name' => 'Category'),
    array('id' => 2,  'parent' => 1, 'name' => 'Category A'),
    array('id' => 3,  'parent' => 1, 'name' => 'Category B'),
    array('id' => 4,  'parent' => 1, 'name' => 'Category C'),
    array('id' => 5,  'parent' => 1, 'name' => 'Category D'),
    array('id' => 6,  'parent' => 1, 'name' => 'Category E'),
    array('id' => 7,  'parent' => 2, 'name' => 'Subcategory F'),
    array('id' => 8,  'parent' => 2, 'name' => 'Subcategory G'),
    array('id' => 9,  'parent' => 3, 'name' => 'Subcategory H'),
    array('id' => 10,  'parent' => 4, 'name' => 'Subcategory I'),
    array('id' => 11, 'parent' => 9, 'name' => 'Subcategory J'),
);

Using this array I have created a nested <ul>. This is the recursive function I have used for :

foreach ($categories as $category) {       
   $id     = $category['id'];
   $parent = $category['parent'];
   $name   = $category['name'];

   //echo $name."<br>";
  $cats[$parent][$id] = $name;   
}

function displayList(&$cats, $parent, $current=0, $level=0) {
  switch ($level) {
    case 0:
      $class      = "level_1 has_sub no_active";
      $a_class    = "c1";
      break;
    case 1:
      $class      = "level_2 has_sub no_active";
      $a_class    = "c2";
      break;
    case 2:
      $class      = "level_3 has_sub no_active";
      $a_class    = "c3";
      break;
  }
  if ($parent==0) {
    foreach ($cats[$parent] as $id=>$nm) {
      if (isset($cats[$id])) {     
        displayList($cats, $id, $current);
      }
    }
  }
  else {
    echo "<ul class='$class'>\n";        
    foreach ($cats[$parent] as $id=>$nm) {
      $clear = preg_replace('/[^a-zA-Z0-9\s]/', '', strip_tags(html_entity_decode($nm)));
      $pageName = strtolower(str_replace(' ', '-', $clear));      
      $link = $pageName.'.php';

      echo "<li><a href='$link' class='$a_class $sel'><span>$nm</span></a>\n";

      if (isset($cats[$id])) {
          displayList($cats, $id, $current, $level+1);
      }
      echo '</li>';
    }
    echo "</ul>\n";
  }  
}

Look at that function, I have created a link for each category. Category name itself has used as page name. (Removing by special chars.)

 

My question is, when this function executing I want to create folders for level one categories. Those category names should be used as folder names. 

 

Example from above array:

category_a
category_b
category_c
category_d
category_e

So, every sub category pages should be inside these parent category folders.

 

Can I know is this possible in this function?

 

Thank you.