Creation of HTML version of PDF

We have a 257 page editable pdf document that contains images and text. The document is a manual for a car and is split into categories. There are multiple levels of categories with Ten top level categories. We need the pdf document to be converted into html that could be easily viewed on a mobile phone with a simple category navigation that at first shows all 10 top level categories/chapters. When the user clicks the main category they are presented with a set of subcategories, and then a third level of categories before they are finally shown the information for that chapter. The pdf needs to be converted into a html that has one column that contains the images and the text and reads with a good flow. All html should have a standard format so we can easily style it after the conversion