Only Show Categories That Have Listings In Them?

Hi all,

I have a fair few categories and i want to only show categories that have listings in them, This is the code i have at the moment that shows all categories regardless -

    $i_substr_cat=substr_count($category, ".");
   
    foreach($categories as $key=>$value)
    {
        $i_substr_key=substr_count($key, ".");
       
        if($i_substr_key != ($i_substr_cat+1))
        {
            continue;
        }
       
        if(strpos($key, $category.".", 0) === 0)
        {...

PHP:

Only Show Categories That Have Listings In Them?

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