jquery-method.js

$.getJSON('http://173.255.193.46/api/edge/popular:themeforest.json?callback=?', function(files) {
    var imgs;

    files = files.popular;
    console.log(files); // see what's available to play with
                   
    imgs  = $.map(files.items_last_week, function(file, i) {            
         return '<a href="' + file.url + '"><img src=' + file.thumbnail + '></a>';
     });

    $(document.body).append(imgs.join(''));
});

php-method.php

<?php

/* 
Remember: whenever you're working with an API, you must implement
some level of caching. Otherwise, the API will be hammered, you'll
exceed your limit, and your page will take longer to load. Think about it - 
why are you requerying the API for every page request, when the data 
only changes sporadically?
*/



/*
 * Parses the url, and return a file name for caching
 * @param string $url - The marketplace API url
 * @param string $cache_dir - Path to the cache directory
 */
function parseURL($url, $cache_dir) {
	preg_match('/\w+:(?!\/\/)\w+/i', $url, $cached_file);
	return "$cache_dir/" . $cached_file[0];
}


/*
 * Determines whether the cached file needs to be replaced
 * @param string $cached_file - The name of the cached file
 * @param string $expires - How long, in hours, the file should have been cached
 */
function has_expired($cached_file, $expires) {
	if ( file_exists($cached_file) ) {
		return time() - $expires * 60 * 60 > filemtime($cached_file);
	}
	return true;
}


/*
 * Retrieves the JSON, and saves it to the cache directory.
 *
 * @param string $cache_dir - Path to the dir that contains the cached files 
 * @param string $cached_file - The name to use for the cached file
 * @param string $url - The marketplace url to query
 */
function cache_it($cache_dir, $cached_file, $url) {
	// Create the cache directory if necessary
	!file_exists($cache_dir) && mkdir($cache_dir);

	$files = json_decode( file_get_contents($url) );

	!empty($files) && file_put_contents( $cached_file, json_encode($files) );

	return $files;
}


/*
 * Handles the process of retrieving the JSON from the marketplace and caching it 
 *
 * @param string $url - The marketplace API url
 * @param integer $expires - How long to cache the results in hours
 * @param string $cache_dir - Path to the dir that contains the cached files 
 */
function get_json($url, $expires = 3, $cache_dir = 'cache') {
	$cached_file = parseURL($url, $cache_dir);
	
	if ( has_expired($cached_file, $expires) ) {
		$files = cache_it($cache_dir, $cached_file, $url);
	} else { // use existing cached version
		$files = json_decode( file_get_contents( $cached_file ) );
	}

	return $files;
}

$files = get_json( 
	'http://marketplace.envato.com/api/edge/popular:codecanyon.json'
);

if ( $files ) {
	foreach($files->popular->items_last_week as $file) {
		echo "<a href=$file->url><img src=$file->thumbnail></a>";
	}
}