I tried auto hyperlink ,make clickable plugins as well coding approaches like <a href="http://example.com/index.php?p=123"> <?php the_content(); ?></a> to see what output I want here sample wordpress post http://marathi.vijaykudal.info/आम्ही-आणि-क्रेडिट-कार्ड-व.html
I cant understand the issue fully. Do you want to make a set of keywords to be Auto hyperlinked? If so, there are plugins for it in word press. However it is not a good habit.
My question is why you would trust such a critical area of SEO as is anchor text - hyperlinks to an unproven process?
This might be sounding like a superb idea to you - but this is not good at all & makes no sense + this way your website will appear as a junk... since its not following a good behavioral protocol, if any. Try reading Google Quality Guidelines to know more.