diff --git a/web/template/syzoj/category.php b/web/template/syzoj/category.php
index 37336bb..46a011e 100644
--- a/web/template/syzoj/category.php
+++ b/web/template/syzoj/category.php
@@ -39,7 +39,9 @@
         ?>
             <h3>其他标签</h3>
             <div class="tag-cloud">
-            <?php foreach ($remaining_tags as $tag): ?>
+            <?php foreach ($remaining_tags as $tag): 
+                if (trim($tag) == "" || trim($tag) == "&nbsp") continue;
+                ?>
                 <a href="problemset.php?search=<?php echo urlencode(trim($tag)); ?>" class="ui label"><?php echo trim($tag); ?></a>
             <?php endforeach; ?>
             </div>