I'm not entirely sure what your question is; I agree with @Mowgli.
Having said that, I'm going to take a stab.
If you're trying to insert column C in the middle of column B, I would move the URL & img to separate columns (for the same of argument, let's make them K & L(as K_B states, you can use FIND to do this.)
Then I'd make column Z1 = "&C1&"