##hi
I found this function to generate an html nested tree from a sql table.
Here it echoes it; but I would like to return it.  Possible ? How ?
Thanks !

	function bp_classifieds_build_tree($array, $parent = 0, $level = 0,$item_fn=false) {
	// Create a function to generate a nested view of an array (looping through each array item)

		if (!$array) {
			return false;
		}

	  //
	  // Reset the flag each time the function is called
	  //
	  $has_children = false;

	  //
	  // Loop through each item of the list array
	  //
	  foreach($array as $key => $item)
	  {
		//
		// For the first run, get the first item with a parent_id of 0 (= root category)
		// (or whatever id is passed to the function)
		//
		// For every subsequent run, look for items with a parent_id matching the current item's key (id)
		// (eg. get all items with a parent_id of 2)
		//
		// This will return false (stop) when it find no more matching items/children
		//
		// If this array item's parent_id value is the same as that passed to the function
		// eg. [parent_id] => 0   == $parent = 0 (true)
		// eg. [parent_id] => 20  == $parent = 0 (false)
		//
		if ($item['parent'] == $parent)
		{

		  //
		  // Only print the wrapper ('<ul>') if this is the first child (otherwise just print the item)
		  // Will be false each time the function is called again
		  //
		  if ($has_children === false)
		  {
			//
			// Switch the flag, start the list wrapper, increase the level count
			//
			$has_children = true;

			echo '<ul class="level-' . $level . '">';

			$level++;
		  }

		  //
		  // Print the list item
		  //
		  echo '<li>';

		  if ($item_fn) {
			$item_fn($item);
		  } else {
			echo $item['name'];
		}

		  //
		  // Repeat function, using the current item's key (id) as the parent_id argument
		  // Gives us a nested list of subcategories
		  //
		  generate_tree_list($array, $key, $level);

		  //
		  // Close the item
		  //
		  echo '</li>';


		}

	  }

	  //
	  // If we opened the wrapper above, close it.
	  //
	  if ($has_children === true) echo '</ul>';
	}
}