add url

Author: pangudashu

README.md

@@ -11,9 +11,9 @@
 <div align="center">
     <img src="img/book.jpg" height="280" >
 </div>
-    
-    <a href="http://github.com/%3C/span%3Ehttps://item.jd.com/12267210.html%3Cspan%20class="x x-first x-last">">[京东]</a>
-    <a href="http://github.com/%3C/span%3Ehttp://product.dangdang.com/25185400.html%3Cspan%20class="x x-first x-last">">[当当]</a>
+
+[京东](https://item.jd.com/12267210.html)
+[当当](http://product.dangdang.com/25185400.html)
 
 ## 目录：
 * 第1章 PHP基本架构