category in content

because the autop filter wp uses, for me, it was rather impossible to get the_category and the_content in one <p> in the same line. wp wraps a <p> around it.
So i disabled the autop function via the functions.php with a remove filter code…
but then there is a problem with the single page <p>. the text is wrapped with only one single paragraph. thats the point where i get stuck.
so, how can i solve the problem? i would like te remove the autop, to get category and start of the content in one line, but on the single page, i like my text wrapped in some more paragraphs…

here is my site. at the moment i removed the filter…