不解释，看代码：

$args=array(  
  'orderby' => 'name',  
  'order' => 'ASC'  
  );  
$categories=get_categories($args);  
  foreach($categories as $category) {  
    echo '<p>Category: name ) . '" ' . '>' . $category->name.' </p> ';  
    echo '<p> Description:'. $category->description . '</p>';  
    echo '<p> Post Count: '. $category->count . '</p>';  }  

下面这些事对应的参数，大家可能会有些疑惑，为什么有了term_id还有一个cat_ID,但其实两个意思是一样的，厄。。。
下面这些参数基本够用了

$category->term_id  
$category->name  
$category->slug  
$category->term_group  
$category->term_taxonomy_id  
$category->taxonomy  
$category->description  
$category->parent  
$category->count  
$category->cat_ID  
$category->category_count  
$category->category_description  
$category->cat_name  
$category->category_nicename  
$category->category_parent