I have found the following piece of code in the [WP Knowledge Base](http://ipanelthemes.com/kb/wp-knowledge-base-theme/kb-overview/wp-knowledge-base-theme/) theme in order to show subcategories of a parent category. The problem is that this only works for the first level of hierarchy, so I wanted to change the if clause in order to check if the current category has children but I have no clue how to do that, any idea?
Thanks

```
global $term_meta, $cat, $cat_id, $wp_query;

// Check if the current category is not a first level category
// This will happen if the current category does not have any child
// If this is the case, then we simply show all it's posts
// Instead of the nice knowledgebase type things
if ( $cat->parent != '0' ) {

```