Add link to category page by id from cms static block/cms page in Magento

If you want to add a link for category page from cms page or cms static block, simply use the category link widget inline link code:

{{widget type="catalog/category_widget_link" anchor_text="Displayed Text" title="Title attribute text" template="catalog/category/widget/link/link_block.phtml" id_path="category/22"}}

There is no need to add <a> tag from cms pages or static blocks.