Unable to open links in new tab on Dolphin
They may be javascript links that Dolphin will execute, but will not provide context menu for as links.  Also we are on 11.2.3 now so if there was a problem with normal links in 10.2.3 it may have been resolved.

Here is a page, 001 Tab Capacity Test,  that has normal links such as underscored "04"  and some JavaScript links in shaded boxes, such as "loc:" at the top.  

The context menu of the JavaScript link is what you would see for plain text, it would be nice to be able to use "Copy link URL" and be able to "Bookmark link" in the normal manner but that is not possible in Dolphin. 

If you still have a problem with a page provide the url of a public webpage (no userid or password required) and the link involved so we can look at the source.

Optional material:
Installing bookmarklets into Dolphin can be a bit tedious and round about, importing them from another browser may be easier.