<?php
	$country_cat_id = 51;
	$current_cat = get_query_var('cat');
	$thisCat = get_category($current_cat,false);
	$subjects=  get_categories('hide_empty=0&child_of='.$current_cat);

	if($thisCat->parent == 0){ // top level category
	  if($current_cat != $country_cat_id) {

			// this is main cat (animals or flowers)
			// first show links to all subcategories (pigs,cats).
		  if($subjects) {
		  	foreach($subjects as $subject) {
		    echo "<li><a href=\"" . get_category_link($subject->cat_ID) . "?show=map&type=continents\"><span>". get_cat_name($subject->cat_ID) ."</span></a></li>";
		  	}
		  }
	  }

	} else { // this is a sub category

	  if(!isset($_GET['show'])) { // show same content as type continents (below)
      $continents  = get_categories('hide_empty=0&parent='.$country_cat_id);
	    foreach($continents as $continent) {
			  echo "<li><a href=\"" . get_category_link($current_cat) . "?show=map&type=continent&place_id=".$continent->cat_ID."\"><span>". get_cat_name($continent->cat_ID) ."</span></a></li>";
			}
		  //echo "<li>Go back to: <a href=\"" . get_category_link($current_cat) . "\"><span>". get_cat_name($current_cat) ."</span></a></li>";
    }

    if(isset($_GET['show']) && $_GET['show'] == 'map') { // show the maps

		  if(isset($_GET['type']) && $_GET['type'] == 'continents'){
			  // show map with continents (Europe, America)
			  echo 'show world map';
		    $continents  = get_categories('hide_empty=0&parent='.$country_cat_id);
	      foreach($continents as $continent) {
			    echo "<li><a href=\"" . get_category_link($current_cat) . "?show=map&type=continent&place_id=".$continent->cat_ID."\"><span>". get_cat_name($continent->cat_ID) ."</span></a></li>";
			  }
		    echo "<li>Go back to: <a href=\"" . get_category_link($current_cat) . "\"><span>". get_cat_name($current_cat) ."</span></a></li>";
		  }

	  if(isset($_GET['type']) && $_GET['type'] == 'continent'){
		  if(isset($_GET['place_id']) && $_GET['place_id']) {
		 	  echo 'show continent map';
		 	  // show map with countries (France, England)
	      $countries  = get_categories('hide_empty=0&parent='.$_GET['place_id']);
        foreach($countries as $country) {
		     echo "<li><a href=\"" . get_category_link($current_cat) . "?show=map&type=country&place_id=".$country->cat_ID."\"><span>". get_cat_name($country->cat_ID) ."</span></a></li>";
		    }
		    echo "<li>Go back to: <a href=\"" . get_category_link($current_cat) . "?show=map&type=continents\"><span>world map</span></a></li>";
      }
	  }

    if(isset($_GET['type']) && $_GET['type'] == 'country'){
		  if(isset($_GET['place_id']) && $_GET['place_id']) {
        echo 'show country map';
		 	  // show map wth regions (region1, region2)
	      $regions = get_categories('hide_empty=0&parent='.$_GET['place_id']);
        foreach($regions as $region) {
		      echo "<li><a href=\"" . get_category_link($current_cat) . "?show=posts&type=region&place_id=".$region->cat_ID."\"><span>". get_cat_name($region->cat_ID) ."</span></a></li>";
		    }
		    $thisCat_parent = get_category($_GET['place_id'],false);
		    echo "<li>Go back to: <a href=\"" . get_category_link($current_cat) . "?show=map&type=continent&place_id=".$thisCat_parent->parent."\"><span>". get_cat_name($thisCat_parent->parent) ."</span></a></li>";
		  }
	  }
  }

  if(isset($_GET['show']) && $_GET['show'] == 'posts'){
      $thisCat_parent = get_category($_GET['place_id'],false);
    	// show posts here
    	// you can use these variables for a query
      // $current_category  = current category (pigs, or cats)
      // $_GET['place_id'] = region category id
      // $thisCat_parent = continent (europe)

    	echo 'show posts here';
      // go back

    	echo "<li>Go back to: <a href=\"" . get_category_link($current_cat) . "?show=map&type=country&place_id=".$thisCat_parent->parent."\"><span>". get_cat_name($thisCat_parent->parent) ."</span></a></li>";
    }
 	}

 ?>