Capitalize first characters after Dot(.)

Question

I want to Capitalize first characters after Dot(.) but my Text Also content Html Tag.

 

So how to solve It.

 

For Exp This Is My Text:-

 

<b><u>food and enjoy food and enjoy .food and enjoy .food and enjoy .food and enjoy food and enjoy .</u></b><div><b><i>food and enjoy food and enjoy food and enjoy food and enjoy .food and enjoy food and enjoy&nbsp;</i></b></div><div><b><font face="arial">food and enjoy food and enjoy&nbsp;</font></b><br></div>