You can also hide a column using the col element https://developer.mozilla.org/en/docs/Web/HTML/Element/col
To hide the second column in a table:
<table>
<col />
<col style="visibility:collapse"/>
<tr><td>visible</td><td>hidden</td></tr>
<tr><td>visible</td><td>hidden</td></tr>
Known issues: this won't work in Google Chrome. Please vote for the bug at https://bugs.chromium.org/p/chromium/issues/detail?id=174167