如何在新标签页脚本中打开Wordpress帖子

I have wordpress website, and all posts are automatically added by another scripts. All posts are like this:

<p> 
<center> 
<!--videoplayer--><iframe src="http://embeds.sample.com/embed/123456" frameborder="0" width="720" height="550" scrolling="no"></iframe><!--endvideoplayer--> 
</center> 
</p><!--START-wtp-INFO - Do not remove these lines--><!--vidsource:sample.come.com--><!--vidcod:12345--><!--vidimage:http://sample2.com/wp-content/videoimages/2075/01/01/9999_sample2.jpg--><!--viddesc:--><!--END-wtp-INFO--> 

There are tens of thousands of posts in my site. Its impossible to change every post manually. I think to make script which will add possibility all POSTS from main page to be oppened in new tab. Any suggestions?

Thanks