In content.php

Hello, I’m trying to use a tag image in content.php on search, author, archive tag and home pages.

I have placed

<img src=”<?php echo z_taxonomy_image_url($cat->term_id); ?>” />

in content.php

but only get

<img src=”” />

in response.

Any ideas what I’m doing wrong?

http://ww.wp.xz.cn/extend/plugins/categories-images/