How modify function the_meta

Hi…
I want to edit function the_meta()

post-template.php

function the_meta() {
	if ( $keys = get_post_custom_keys() ) {
		echo "<ul class='post-meta'>\n";
		foreach ( (array) $keys as $key ) {
			$keyt = trim($key);
			if ( is_protected_meta( $keyt, 'post' ) )
				continue;
			$values = array_map('trim', get_post_custom_values($key));
			$value = implode($values,', ');
			echo apply_filters('the_meta_key', "<li><span class='post-meta-key'>$key:</span> $value</li>\n", $key, $value);
		}
		echo "</ul>\n";
	}
}

I want delete “
<li><span class='post-meta-key'>...", but I don’t want to edit the file post-template.php

How?
Thanks…

[please do not bump]